added Bacteria monster to Backrooms game with camouflage mechanics, lure sounds, and sprinting behavior

Reviewed-on: #14
Reviewed-by: Lars Neuhaus <larslukasneuhaus@gmx.de>

.idea/compiler.xml

@@ -3,4 +3,11 @@
   <component name="CompilerConfiguration">
     <bytecodeTargetLevel target="21" />
   </component>
+  <component name="JavacSettings">
+    <option name="ADDITIONAL_OPTIONS_OVERRIDE">
+      <module name="Minigames" options="-Xlint:deprecation" />
+      <module name="Minigames.test" options="-Xlint:deprecation" />
+      <module name="eu.mhsl.minenet.Minigames.main" options="-Xlint:deprecation" />
+    </option>
+  </component>
 </project>

.idea/misc.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="ExternalStorageConfigurationManager" enabled="true" />
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="21" project-jdk-type="JavaSDK" />
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_25" default="true" project-jdk-name="openjdk-25" project-jdk-type="JavaSDK" />
 </project>

build.gradle

@@ -3,7 +3,7 @@
 
 plugins {
     id 'java'
-    id "com.github.johnrengelman.shadow" version "7.1.0"
+    id "com.gradleup.shadow" version "9.6.0"
 }
 
 group 'eu.mhsl.minenet'
@@ -11,58 +11,33 @@ version '1.0-SNAPSHOT'
 
 repositories {
     mavenCentral()
-    google()
-
-    maven {
-        url 'https://jitpack.io'
-    }
-
-    maven {
-        url "https://repo.unnamed.team/repository/unnamed-public/"
-    }
-
-    maven {
-        url 'https://oss.sonatype.org/content/repositories/snapshots'
-    }
 }
 
-allprojects {
-    repositories {
-        maven { url "https://jitpack.io" }
-    }
-}
-
-
 java {
     toolchain {
-        languageVersion = JavaLanguageVersion.of(21)
+        languageVersion = JavaLanguageVersion.of(25)
     }
 }
 
 dependencies {
-    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.9.0'
-    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.9.0'
+    testImplementation 'org.junit.jupiter:junit-jupiter:6.1.2'
+    testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
 
-    //https://jitpack.io/#Minestom/Minestom
-    implementation 'net.minestom:minestom-snapshots:fd51c8d17a'
+    //https://mvnrepository.com/artifact/net.minestom/minestom
+    implementation 'net.minestom:minestom:2026.07.12-26.2'
 
     //Tools
-    implementation 'de.articdive:jnoise:3.0.2'
+    implementation 'de.articdive:jnoise-pipeline:4.1.0'
+    compileOnly 'it.unimi.dsi:fastutil:8.5.18' // von Minestom nur zur Laufzeit bereitgestellt, fuer BatchUtil-Reflection benoetigt
     implementation 'net.md-5:bungeecord-config:1.21-R0.3'
-    implementation 'org.apache.commons:commons-text:1.10.0'
-    implementation 'org.spongepowered:configurate-yaml:4.1.2'
+    implementation 'org.apache.commons:commons-text:1.15.0'
+    implementation 'org.spongepowered:configurate-yaml:4.2.0'
     implementation 'com.sparkjava:spark-core:2.9.4'
-    implementation 'com.google.code.gson:gson:2.10.1'
-    implementation 'com.google.guava:guava:32.0.1-android'
-
+    implementation 'com.google.code.gson:gson:2.14.0'
+    implementation 'com.google.guava:guava:33.4.8-jre'
 
     //PvP
-    implementation 'io.github.TogAr2:MinestomPvP:PR62-SNAPSHOT'
-
-    // Hephaestus engine
-//    implementation("team.unnamed:hephaestus-api:0.2.1-SNAPSHOT")
-//    implementation("team.unnamed:hephaestus-reader-blockbench:0.2.1-SNAPSHOT")
-//    implementation("team.unnamed:hephaestus-runtime-minestom:0.2.1-SNAPSHOT")
+    implementation 'io.github.togar2:MinestomPvP:2026.05.30-26.1.1'
 }
 
 tasks {
@@ -71,8 +46,6 @@ tasks {
             attributes 'Main-Class': 'eu.mhsl.minenet.minigames.Main'
             attributes 'Multi-Release': true
         }
-        duplicatesStrategy = 'exclude'
-        from configurations.compileClasspath.collect { it.isDirectory() ? it : zipTree(it) }
     }
     build {
         dependsOn(shadowJar)
@@ -89,3 +62,7 @@ tasks.register('copyJarToServer', Exec) {
 
     commandLine 'scp', 'build/libs/Minigames-1.0-SNAPSHOT.jar', 'root@10.20.6.5:/root/minigames'
 }
+
+tasks.withType(JavaCompile) {
+    options.compilerArgs << "-Xlint:deprecation"
+}

gradle/wrapper/gradle-wrapper.properties

@@ -1,7 +1,9 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.10-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.6.1-bin.zip
 networkTimeout=10000
+retries=0
+retryBackOffMs=500
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

gradlew

@@ -1,7 +1,7 @@
 #!/bin/sh
 
 #
-# Copyright © 2015-2021 the original authors.
+# Copyright © 2015 the original authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -20,7 +20,7 @@
 
 ##############################################################################
 #
-#   Gradle start up script for POSIX generated by Gradle.
+#   gradlew start up script for POSIX generated by Gradle.
 #
 #   Important for running:
 #
@@ -29,7 +29,7 @@
 #       bash, then to run this script, type that shell name before the whole
 #       command line, like:
 #
-#           ksh Gradle
+#           ksh gradlew
 #
 #       Busybox and similar reduced shells will NOT work, because this script
 #       requires all of these POSIX shell features:
@@ -57,7 +57,7 @@
 #       Darwin, MinGW, and NonStop.
 #
 #   (3) This script is generated from the Groovy template
-#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       https://github.com/gradle/gradle/blob/3d91ce3b8caaf77ad09f381f43615b715b53f72c/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
 #       within the Gradle project.
 #
 #       You can find Gradle at https://github.com/gradle/gradle/.
@@ -86,8 +86,7 @@ done
 # shellcheck disable=SC2034
 APP_BASE_NAME=${0##*/}
 # Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
-APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s
-' "$PWD" ) || exit
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD=maximum
@@ -115,7 +114,6 @@ case "$( uname )" in                #(
   NONSTOP* )        nonstop=true ;;
 esac
 
-CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 
 
 # Determine the Java command to use to start the JVM.
@@ -173,7 +171,6 @@ fi
 # For Cygwin or MSYS, switch paths to Windows format before running java
 if "$cygwin" || "$msys" ; then
     APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
-    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
 
     JAVACMD=$( cygpath --unix "$JAVACMD" )
 
@@ -206,15 +203,14 @@ fi
 DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
 
 # Collect all arguments for the java command:
-#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
 #     and any embedded shellness will be escaped.
 #   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
 #     treated as '${Hostname}' itself on the command line.
 
 set -- \
         "-Dorg.gradle.appname=$APP_BASE_NAME" \
-        -classpath "$CLASSPATH" \
-        org.gradle.wrapper.GradleWrapperMain \
+        -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
         "$@"
 
 # Stop when "xargs" is not available.

gradlew.bat

@@ -19,12 +19,12 @@
 @if "%DEBUG%"=="" @echo off
 @rem ##########################################################################
 @rem
-@rem  Gradle startup script for Windows
+@rem  gradlew startup script for Windows
 @rem
 @rem ##########################################################################
 
-@rem Set local scope for the variables with windows NT shell
-if "%OS%"=="Windows_NT" setlocal
+@rem Set local scope for the variables, and ensure extensions are enabled
+setlocal EnableExtensions
 
 set DIRNAME=%~dp0
 if "%DIRNAME%"=="" set DIRNAME=.
@@ -51,7 +51,7 @@ echo. 1>&2
 echo Please set the JAVA_HOME variable in your environment to match the 1>&2
 echo location of your Java installation. 1>&2
 
-goto fail
+"%COMSPEC%" /c exit 1
 
 :findJavaFromJavaHome
 set JAVA_HOME=%JAVA_HOME:"=%
@@ -65,30 +65,18 @@ echo. 1>&2
 echo Please set the JAVA_HOME variable in your environment to match the 1>&2
 echo location of your Java installation. 1>&2
 
-goto fail
+"%COMSPEC%" /c exit 1
 
 :execute
 @rem Setup the command line
 
-set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
 
 
-@rem Execute Gradle
-"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+@rem Execute gradlew
+@rem endlocal doesn't take effect until after the line is parsed and variables are expanded
+@rem which allows us to clear the local environment before executing the java command
+endlocal & "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %* & call :exitWithErrorLevel
 
-:end
-@rem End local scope for the variables with windows NT shell
-if %ERRORLEVEL% equ 0 goto mainEnd
-
-:fail
-rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
-rem the _cmd.exe /c_ return code!
-set EXIT_CODE=%ERRORLEVEL%
-if %EXIT_CODE% equ 0 set EXIT_CODE=1
-if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
-exit /b %EXIT_CODE%
-
-:mainEnd
-if "%OS%"=="Windows_NT" endlocal
-
-:omega
+:exitWithErrorLevel
+@rem Use "%COMSPEC%" /c exit to allow operators to work properly in scripts
+"%COMSPEC%" /c exit %ERRORLEVEL%

src/main/java/eu/mhsl/minenet/minigames/Main.java

@@ -3,12 +3,12 @@ package eu.mhsl.minenet.minigames;
 import eu.mhsl.minenet.minigames.api.HttpServer;
 import eu.mhsl.minenet.minigames.command.Commands;
 import eu.mhsl.minenet.minigames.handler.Listeners;
+import eu.mhsl.minenet.minigames.instance.Dimension;
 import eu.mhsl.minenet.minigames.lang.Languages;
 import eu.mhsl.minenet.minigames.server.tasks.TablistUpdateTask;
+import net.minestom.server.Auth;
 import net.minestom.server.MinecraftServer;
-import net.minestom.server.extras.bungee.BungeeCordProxy;
 import net.minestom.server.extras.lan.OpenToLAN;
-import net.minestom.server.extras.velocity.VelocityProxy;
 import net.minestom.server.timer.TaskSchedule;
 import org.spongepowered.configurate.ConfigurateException;
 import org.spongepowered.configurate.ConfigurationNode;
@@ -25,7 +25,7 @@ public class Main {
     public static ConfigurationNode globalConfig;
 
     @SuppressWarnings("ResultOfMethodCallIgnored")
-    public static void main(String[] args) throws ConfigurateException {
+    static void main(String[] args) throws ConfigurateException {
         //noinspection ResultOfMethodCallIgnored
         Resource.values(); // This initializes and preloads the enum and extracts the resources
         Languages.getInstance(); //Preload languages into the jvm
@@ -38,14 +38,31 @@ public class Main {
 
         ConfigurationNode serverConfig = globalConfig.node("server");
 
+        // muss vor MinecraftServer.init() gesetzt werden: ServerFlag liest die Properties statisch beim Klassenladen;
+        // bei fehlendem/ungueltigem Config-Wert den Minestom-Default behalten (0 wuerde keine Chunks senden)
+        int viewDistance = serverConfig.node("view-distance").getInt(0);
+        if(viewDistance > 0) {
+            System.setProperty("minestom.chunk-view-distance", String.valueOf(viewDistance));
+        }
+
         logger.info("Initialize Minecraft server...");
 
-        MinecraftServer server = MinecraftServer.init();
+        Auth auth = new Auth.Offline();
+        if(globalConfig.node("bungeecord", "enabled").getBoolean()) {
+            auth = new Auth.Bungee();
+        } else if(globalConfig.node("velocity", "enabled").getBoolean()) {
+            auth = new Auth.Velocity(Objects.requireNonNull(globalConfig.node("velocity", "secret").getString()));
+        }
+
+        MinecraftServer server = MinecraftServer.init(auth);
 //        MinestomPvP.init();
 
+        // Dimensionen muessen vor server.start() registriert werden:
+        // seit Minestom 26.x sind die dynamischen Registries nach dem Start eingefroren
+        Dimension.values();
+
         MinecraftServer.setBrandName("mhsl.eu - minenet - credits to minestom");
         MinecraftServer.setCompressionThreshold(serverConfig.node("compression-threshold").getInt(0));
-        System.setProperty("minestom.chunk-view-distance", String.valueOf(serverConfig.node("view-distance").getInt()));
 
         Commands.values();
         Listeners.values();
@@ -57,12 +74,6 @@ public class Main {
 
         if(serverConfig.node("open-to-lan").getBoolean()) OpenToLAN.open();
 
-        if(globalConfig.node("bungeecord", "enabled").getBoolean()) BungeeCordProxy.enable();
-
-        if(globalConfig.node("velocity", "enabled").getBoolean()) {
-            VelocityProxy.enable(Objects.requireNonNull(globalConfig.node("velocity", "secret").getString()));
-        }
-
         server.start("0.0.0.0", serverConfig.node("port").getInt(25565));
         System.gc();
 

src/main/java/eu/mhsl/minenet/minigames/command/privileged/SetMemorialCommand.java

@@ -35,7 +35,7 @@ public class SetMemorialCommand extends PrivilegedCommand {
                 .getTournament()
                 .setMemorialConfiguration(
                     new MemorialConfiguration(
-                        Material.fromNamespaceId(context.get(materialArgument)),
+                        Material.fromKey(context.get(materialArgument)),
                         context.get(titleArgument),
                         context.get(loreArgument)
                     )

src/main/java/eu/mhsl/minenet/minigames/command/privileged/SetRewardCommand.java

@@ -37,7 +37,7 @@ public class SetRewardCommand extends PrivilegedCommand {
                 .getTournament()
                 .setRewardConfiguration(
                     new RewardConfiguration(
-                        Material.fromNamespaceId(context.get(materialArgument)),
+                        Material.fromKey(context.get(materialArgument)),
                         Arrays.stream(context.get(amountsArgument)).map(Integer::valueOf).collect(Collectors.toList())
                     )
                 );

src/main/java/eu/mhsl/minenet/minigames/handler/Listeners.java

@@ -2,6 +2,7 @@ package eu.mhsl.minenet.minigames.handler;
 
 import eu.mhsl.minenet.minigames.handler.global.AddEntityToInstanceEventListener;
 import eu.mhsl.minenet.minigames.handler.global.ChatFormatHandler;
+import eu.mhsl.minenet.minigames.handler.global.PlayerFreezeHandler;
 import eu.mhsl.minenet.minigames.handler.global.PlayerLeaveHandler;
 import eu.mhsl.minenet.minigames.handler.global.PlayerLoginHandler;
 import net.minestom.server.MinecraftServer;
@@ -11,6 +12,7 @@ public enum Listeners {
     SPAWN(new AddEntityToInstanceEventListener()),
     LOGIN(new PlayerLoginHandler()),
     LEAVE(new PlayerLeaveHandler()),
+    FREEZE(new PlayerFreezeHandler()),
     CHAT(new ChatFormatHandler());
 
     Listeners(EventListener<?> event) {

src/main/java/eu/mhsl/minenet/minigames/handler/global/ChatFormatHandler.java

@@ -2,6 +2,8 @@ package eu.mhsl.minenet.minigames.handler.global;
 
 import eu.mhsl.minenet.minigames.message.Icon;
 import eu.mhsl.minenet.minigames.message.type.ChatMessage;
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.format.NamedTextColor;
 import net.minestom.server.event.EventListener;
 import net.minestom.server.event.player.PlayerChatEvent;
 import org.jetbrains.annotations.NotNull;
@@ -14,7 +16,14 @@ public class ChatFormatHandler implements EventListener<PlayerChatEvent> {
 
     @Override
     public @NotNull Result run(@NotNull PlayerChatEvent event) {
-        event.setFormattedMessage(new ChatMessage(Icon.CHAT).appendStatic(event.getRawMessage()).build(event.getPlayer()));
+        NamedTextColor color = event.getPlayer().getPermissionLevel() > 0 ? NamedTextColor.AQUA : NamedTextColor.GRAY;
+        event.setFormattedMessage(
+            new ChatMessage(Icon.CHAT)
+                .appendStatic(Component.text(event.getPlayer().getUsername(), color))
+                .appendStatic(Component.text(" > ", NamedTextColor.DARK_GRAY))
+                .appendStatic(event.getRawMessage())
+                .build(event.getPlayer())
+        );
         return Result.SUCCESS;
     }
 }

src/main/java/eu/mhsl/minenet/minigames/handler/global/PlayerFreezeHandler.java

@@ -0,0 +1,43 @@
+package eu.mhsl.minenet.minigames.handler.global;
+
+import net.minestom.server.coordinate.Pos;
+import net.minestom.server.entity.Player;
+import net.minestom.server.event.EventListener;
+import net.minestom.server.event.player.PlayerTickEvent;
+import net.minestom.server.instance.Instance;
+import net.minestom.server.instance.block.Block;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Weder Minestom noch MinestomPvP verwalten die TICKS_FROZEN-Metadata. Der 26.x-Client baut das
+ * Freeze-Overlay bei Powder-Snow-Kontakt zwar selbst auf, der Abbau ist aber server-authoritative —
+ * ohne diese Vanilla-Logik bleibt das Overlay dauerhaft haengen (auch ueber Instanzwechsel hinweg).
+ */
+public class PlayerFreezeHandler implements EventListener<PlayerTickEvent> {
+    private static final int TICKS_REQUIRED_TO_FREEZE = 140;
+
+    @Override
+    public @NotNull Class<PlayerTickEvent> eventType() {
+        return PlayerTickEvent.class;
+    }
+
+    @Override
+    public @NotNull Result run(@NotNull PlayerTickEvent event) {
+        Player p = event.getPlayer();
+        Instance instance = p.getInstance();
+        if(instance == null) return Result.SUCCESS;
+
+        Pos pos = p.getPosition();
+        boolean inPowderSnow = instance.getBlock(pos).compare(Block.POWDER_SNOW)
+            || instance.getBlock(pos.add(0, 1, 0)).compare(Block.POWDER_SNOW);
+
+        int ticksFrozen = p.getEntityMeta().getTickFrozen();
+        if(inPowderSnow) {
+            p.getEntityMeta().setTickFrozen(Math.min(TICKS_REQUIRED_TO_FREEZE, ticksFrozen + 1));
+        } else if(ticksFrozen > 0) {
+            p.getEntityMeta().setTickFrozen(Math.max(0, ticksFrozen - 2));
+        }
+
+        return Result.SUCCESS;
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/Dimension.java

@@ -1,45 +1,81 @@
 package eu.mhsl.minenet.minigames.instance;
 
+import net.kyori.adventure.key.Key;
 import net.minestom.server.MinecraftServer;
-import net.minestom.server.registry.DynamicRegistry;
-import net.minestom.server.utils.NamespaceID;
+import net.minestom.server.registry.RegistryKey;
+import net.minestom.server.registry.RegistryTag;
+import net.kyori.adventure.text.format.NamedTextColor;
+import net.kyori.adventure.text.format.TextColor;
 import net.minestom.server.world.DimensionType;
+import net.minestom.server.world.attribute.EnvironmentAttribute;
+import net.minestom.server.world.clock.WorldClock;
+import net.minestom.server.world.timeline.Timeline;
 
 /**
  * Prebuilt dimensions
  */
 public enum Dimension {
     OVERWORLD(
-        NamespaceID.from("minenet:fullbright_overworld"),
+        Key.key("minenet:fullbright_overworld"),
         DimensionType
             .builder()
-            .ambientLight(2.0f)
+            // Fullbright: seit MC 26.1 laeuft die Grundhelligkeit ueber das Environment-Attribut
+            // AMBIENT_LIGHT_COLOR (Vanilla-Overworld: #0A0A0A); der alte ambientLight-2.0-Hack
+            // liegt ausserhalb der validen Range und bricht das Client-Rendering
+            .setAttribute(EnvironmentAttribute.AMBIENT_LIGHT_COLOR, NamedTextColor.WHITE)
+            // defaultClock noetig, damit Instance#setTime/#defaultClock funktionieren (sonst null); Timelines wie Vanilla-Overworld
+            .defaultClock(WorldClock.OVERWORLD)
+            .timelines(RegistryTag.direct(Timeline.DAY, Timeline.MOON, Timeline.EARLY_GAME, Timeline.VILLAGER_SCHEDULE))
             .build()
     ),
 
     NETHER(
-        NamespaceID.from("minenet:fullbright_nether"),
+        Key.key("minenet:fullbright_nether"),
         DimensionType
             .builder()
-            .ambientLight(2.0f)
-            .effects("minecraft:the_nether")
+            // Fullbright: seit MC 26.1 laeuft die Grundhelligkeit ueber das Environment-Attribut
+            // AMBIENT_LIGHT_COLOR (Vanilla-Overworld: #0A0A0A); der alte ambientLight-2.0-Hack
+            // liegt ausserhalb der validen Range und bricht das Client-Rendering
+            .setAttribute(EnvironmentAttribute.AMBIENT_LIGHT_COLOR, NamedTextColor.WHITE)
+            .skybox(DimensionType.Skybox.NONE)
+            .defaultClock(WorldClock.OVERWORLD)
+            .timelines(RegistryTag.direct(Timeline.VILLAGER_SCHEDULE))
             .build()
     ),
 
     THE_END(
-        NamespaceID.from("minenet:fullbright_end"),
+        Key.key("minenet:fullbright_end"),
         DimensionType
             .builder()
-            .ambientLight(2.0f)
-            .effects("minecraft:the_end")
+            // Fullbright: seit MC 26.1 laeuft die Grundhelligkeit ueber das Environment-Attribut
+            // AMBIENT_LIGHT_COLOR (Vanilla-Overworld: #0A0A0A); der alte ambientLight-2.0-Hack
+            // liegt ausserhalb der validen Range und bricht das Client-Rendering
+            .setAttribute(EnvironmentAttribute.AMBIENT_LIGHT_COLOR, NamedTextColor.WHITE)
+            .skybox(DimensionType.Skybox.END)
+            .defaultClock(WorldClock.THE_END)
+            .timelines(RegistryTag.direct(Timeline.VILLAGER_SCHEDULE))
+            .build()
+    ),
+
+    BACKROOMS(
+        Key.key("minenet:backrooms"),
+        DimensionType
+            .builder()
+            // Sehr dunkles Grundlicht (knapp ueber Vanilla-Overworld #0A0A0A): die eigentliche
+            // Helligkeit kommt aus echten Lichtquellen via LightingChunk — Blackout-Biome
+            // sind dadurch tatsaechlich dunkel, mit weichen Uebergaengen am Zonenrand
+            .setAttribute(EnvironmentAttribute.AMBIENT_LIGHT_COLOR, TextColor.color(0x16160F))
+            .skybox(DimensionType.Skybox.NONE)
+            .defaultClock(WorldClock.OVERWORLD)
+            .timelines(RegistryTag.direct(Timeline.VILLAGER_SCHEDULE))
             .build()
     );
 
     public final DimensionType DIMENSION;
-    public final NamespaceID namespaceID;
-    public final DynamicRegistry.Key<DimensionType> key;
+    public final Key namespaceID;
+    public final RegistryKey<DimensionType> key;
 
-    Dimension(NamespaceID namespaceID, DimensionType dimType) {
+    Dimension(Key namespaceID, DimensionType dimType) {
         this.DIMENSION = dimType;
         this.namespaceID = namespaceID;
 

src/main/java/eu/mhsl/minenet/minigames/instance/MineNetInstance.java

@@ -1,21 +1,29 @@
 package eu.mhsl.minenet.minigames.instance;
 
 import eu.mhsl.minenet.minigames.message.component.TranslatedComponent;
+import net.kyori.adventure.key.Key;
 import net.minestom.server.MinecraftServer;
 import net.minestom.server.entity.Player;
 import net.minestom.server.event.instance.AddEntityToInstanceEvent;
 import net.minestom.server.event.instance.RemoveEntityFromInstanceEvent;
 import net.minestom.server.instance.Instance;
 import net.minestom.server.instance.InstanceContainer;
-import net.minestom.server.registry.DynamicRegistry;
+import net.minestom.server.registry.RegistryKey;
 import net.minestom.server.timer.TaskSchedule;
 import net.minestom.server.world.DimensionType;
 
 import java.util.UUID;
 
 public class MineNetInstance extends InstanceContainer {
-    public MineNetInstance(DynamicRegistry.Key<DimensionType> type) {
-        super(UUID.randomUUID(), type);
+    public MineNetInstance(RegistryKey<DimensionType> type) {
+        this(UUID.randomUUID(), type);
+    }
+
+    // Eindeutiger Dimension-Name pro Instanz: Minestom entscheidet anhand dieses Namens (nicht des
+    // DimensionTypes), ob beim setInstance das volle Respawn-Protokoll gefahren wird. Ohne den Reset
+    // rendert der 26.x-Client nach einem Wechsel zwischen Instanzen gleicher Dimension keine Chunks.
+    private MineNetInstance(UUID uuid, RegistryKey<DimensionType> type) {
+        super(uuid, type, Key.key("minenet", "instance-" + uuid));
         MinecraftServer.getInstanceManager().registerInstance(this);
 
         this.eventNode()

src/main/java/eu/mhsl/minenet/minigames/instance/game/Game.java

@@ -16,7 +16,7 @@ import net.minestom.server.event.item.ItemDropEvent;
 import net.minestom.server.event.player.PlayerBlockBreakEvent;
 import net.minestom.server.event.player.PlayerBlockPlaceEvent;
 import net.minestom.server.event.player.PlayerMoveEvent;
-import net.minestom.server.registry.DynamicRegistry;
+import net.minestom.server.registry.RegistryKey;
 import net.minestom.server.timer.ExecutionType;
 import net.minestom.server.timer.TaskSchedule;
 import net.minestom.server.world.DimensionType;
@@ -34,7 +34,7 @@ public abstract class Game extends MineNetInstance implements Spawnable {
     protected boolean isRunning = false;
     protected boolean isBeforeBeginning = true;
 
-    public Game(DynamicRegistry.Key<DimensionType> dimensionType) {
+    public Game(RegistryKey<DimensionType> dimensionType) {
         super(dimensionType);
 
         MinecraftServer.getInstanceManager().registerInstance(this);

src/main/java/eu/mhsl/minenet/minigames/instance/game/GameList.java

@@ -5,15 +5,19 @@ import eu.mhsl.minenet.minigames.instance.game.stateless.types.acidRain.AcidRain
 import eu.mhsl.minenet.minigames.instance.game.stateless.types.anvilRun.AnvilRunFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.BackroomsFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.types.bedwars.BedwarsFactory;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.blockBattle.BlockBattleFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.types.blockBreakRace.BlockBreakRaceFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.types.boatRace.BoatRaceFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.types.bowSpleef.BowSpleefFactory;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.colorJump.ColorJumpFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.types.deathcube.DeathcubeFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.types.elytraRace.ElytraRaceFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.types.fastbridge.FastbridgeFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.types.highGround.HighGroundFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.types.jumpDive.JumpDiveFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.types.minerun.MinerunFactory;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.pillars.PillarsFactory;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.PlayerRaceFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.types.spaceSnake.SpaceSnakeFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.types.spleef.SpleefFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.types.stickfight.StickFightFactory;
@@ -31,7 +35,7 @@ public enum GameList {
     STICKFIGHT(new StickFightFactory(), GameType.PROTOTYPE),
     TOWERDEFENSE(new TowerdefenseFactory(), GameType.PROTOTYPE),
     BEDWARS(new BedwarsFactory(), GameType.PROTOTYPE),
-    BACKROOMS(new BackroomsFactory(), GameType.PROTOTYPE),
+    BACKROOMS(new BackroomsFactory(), GameType.PVE),
     BOWSPLEEF(new BowSpleefFactory(), GameType.PROTOTYPE),
     TETRIS(new TetrisFactory(), GameType.OTHER),
     TNTRUN(new TntRunFactory(), GameType.OTHER),
@@ -46,7 +50,11 @@ public enum GameList {
     FASTBRIDGE(new FastbridgeFactory(), GameType.OTHER),
     BLOCKBREAKRACE(new BlockBreakRaceFactory(), GameType.OTHER),
     SPACESNAKE(new SpaceSnakeFactory(), GameType.PVP),
-    BOATRACE(new BoatRaceFactory(), GameType.OTHER);
+    BOATRACE(new BoatRaceFactory(), GameType.OTHER),
+    PILLARS(new PillarsFactory(), GameType.PROTOTYPE),
+    BLOCKBATTLE(new BlockBattleFactory(), GameType.PVP),
+    COLORJUMP(new ColorJumpFactory(), GameType.JUMPNRUN),
+    PLAYERRACE(new PlayerRaceFactory(), GameType.JUMPNRUN);
 
     private final GameFactory factory;
     private final GameType type;

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/StatelessGame.java

@@ -9,7 +9,7 @@ import eu.mhsl.minenet.minigames.score.Score;
 import net.kyori.adventure.audience.Audience;
 import net.kyori.adventure.text.Component;
 import net.kyori.adventure.text.format.NamedTextColor;
-import net.minestom.server.registry.DynamicRegistry;
+import net.minestom.server.registry.RegistryKey;
 import net.minestom.server.timer.ExecutionType;
 import net.minestom.server.timer.Task;
 import net.minestom.server.timer.TaskSchedule;
@@ -26,7 +26,7 @@ public class StatelessGame extends Game {
     private int timeLimit = 0;
     private int timePlayed = 0;
 
-    public StatelessGame(DynamicRegistry.Key<DimensionType> dimensionType, String gameName, Score score) {
+    public StatelessGame(RegistryKey<DimensionType> dimensionType, String gameName, Score score) {
         super(dimensionType);
         this.score = score;
         this.name = gameName;

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/config/GameConfigurationInventory.java

@@ -14,9 +14,9 @@ import net.minestom.server.MinecraftServer;
 import net.minestom.server.entity.Player;
 import net.minestom.server.event.instance.AddEntityToInstanceEvent;
 import net.minestom.server.event.instance.RemoveEntityFromInstanceEvent;
+import net.minestom.server.event.inventory.InventoryPreClickEvent;
 import net.minestom.server.inventory.InventoryType;
-import net.minestom.server.inventory.click.ClickType;
-import net.minestom.server.inventory.condition.InventoryConditionResult;
+import net.minestom.server.inventory.click.Click;
 import net.minestom.server.item.ItemStack;
 import net.minestom.server.item.Material;
 import net.minestom.server.sound.SoundEvent;
@@ -106,8 +106,8 @@ public class GameConfigurationInventory extends InteractableInventory {
     }
 
     @Override
-    protected void onClick(Player player, int slot, ClickType clickType, InventoryConditionResult inventoryConditionResult) {
-        inventoryConditionResult.setCancel(true);
+    protected void onClick(Player player, int slot, Click click, InventoryPreClickEvent event) {
+        event.setCancelled(true);
 
         if(!this.map.containsKey(slot)) return;
 

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/acidRain/AcidRain.java

@@ -1,6 +1,7 @@
 package eu.mhsl.minenet.minigames.instance.game.stateless.types.acidRain;
 
-import de.articdive.jnoise.JNoise;
+import de.articdive.jnoise.generators.noisegen.opensimplex.FastSimplexNoiseGenerator;
+import de.articdive.jnoise.pipeline.JNoise;
 import eu.mhsl.minenet.minigames.instance.Dimension;
 import eu.mhsl.minenet.minigames.instance.game.stateless.StatelessGame;
 import eu.mhsl.minenet.minigames.score.LastWinsScore;
@@ -28,9 +29,8 @@ import java.util.concurrent.CompletableFuture;
 
 public class AcidRain extends StatelessGame {
     final JNoise noise = JNoise.newBuilder()
-        .fastSimplex()
-        .setSeed(this.rnd.nextLong())
-        .setFrequency(0.09)
+        .fastSimplex(FastSimplexNoiseGenerator.newBuilder().setSeed(this.rnd.nextLong()).build())
+        .scale(0.09)
         .build();
     final private int radius = 20;
     final private int roofHeight = 55;
@@ -105,7 +105,7 @@ public class AcidRain extends StatelessGame {
             for(int z = -radius; z <= radius; z++) {
                 batch.setBlock(x, this.roofHeight, z, Block.AIR);
                 if(new Pos(x, 0, z).distance(new Pos(0, 0, 0)) > radius) continue;
-                if(this.noise.getNoise(x + offset, z + offset) > 0.4) continue;
+                if(this.noise.evaluateNoise(x + offset, z + offset) > 0.4) continue;
 
                 batch.setBlock(x, this.roofHeight, z, Block.OAK_PLANKS);
             }

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/Backrooms.java

@@ -1,20 +0,0 @@
-package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms;
-
-import eu.mhsl.minenet.minigames.instance.Dimension;
-import eu.mhsl.minenet.minigames.instance.game.stateless.StatelessGame;
-import eu.mhsl.minenet.minigames.score.NoScore;
-import net.minestom.server.event.player.PlayerBlockBreakEvent;
-import org.jetbrains.annotations.NotNull;
-
-public class Backrooms extends StatelessGame {
-    public Backrooms() {
-        super(Dimension.NETHER.key, "Backrooms", new NoScore());
-        BackroomsGenerator generator = new BackroomsGenerator();
-        this.setGenerator(unit -> generator.generateRoom(unit, 50));
-    }
-
-    @Override
-    protected void onBlockBreak(@NotNull PlayerBlockBreakEvent playerBlockBreakEvent) {
-        playerBlockBreakEvent.setCancelled(false);
-    }
-}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/BackroomsFactory.java

@@ -1,21 +1,52 @@
 package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms;
 
 import eu.mhsl.minenet.minigames.instance.game.Game;
+import eu.mhsl.minenet.minigames.instance.game.stateless.config.ConfigManager;
 import eu.mhsl.minenet.minigames.instance.game.stateless.config.GameFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.config.Option;
+import eu.mhsl.minenet.minigames.instance.game.stateless.config.common.NumericOption;
 import eu.mhsl.minenet.minigames.instance.room.Room;
 import eu.mhsl.minenet.minigames.message.component.TranslatedComponent;
+import net.minestom.server.item.Material;
 
 import java.util.Map;
 
 public class BackroomsFactory implements GameFactory {
     @Override
     public TranslatedComponent name() {
-        return TranslatedComponent.byId("gameBackrooms");
+        return TranslatedComponent.byId("game_Backrooms#name");
+    }
+
+    @Override
+    public TranslatedComponent description() {
+        return TranslatedComponent.byId("game_Backrooms#description");
+    }
+
+    @Override
+    public Material symbol() {
+        return Material.YELLOW_TERRACOTTA;
+    }
+
+    @Override
+    public ConfigManager configuration() {
+        return new ConfigManager()
+            .addOption(new NumericOption("levels", Material.LADDER, TranslatedComponent.byId("game_Backrooms#optionLevels"), 3, 2, 4, 5))
+            .addOption(new NumericOption("lives", Material.TOTEM_OF_UNDYING, TranslatedComponent.byId("game_Backrooms#optionLives"), 3, 1, 2, 5))
+            .addOption(new NumericOption("monsterDensity", Material.ZOMBIE_HEAD, TranslatedComponent.byId("game_Backrooms#optionMonsterDensity"), 2, 1, 3))
+            .addOption(new NumericOption("size", Material.MAP, TranslatedComponent.byId("game_Backrooms#optionSize"), 0, 1, 2, 3))
+            // 0/1 statt BoolOption: deren erster Eintrag "true" waere sonst der Default
+            .addOption(new NumericOption("hardcoreSanity", Material.WITHER_ROSE, TranslatedComponent.byId("game_Backrooms#optionHardcoreSanity"), 0, 1));
     }
 
     @Override
     public Game manufacture(Room parent, Map<String, Option<?>> configuration) throws Exception {
-        return new Backrooms().setParent(parent);
+        return new BackroomsGame(
+            configuration.get("levels").getAsInt(),
+            configuration.get("lives").getAsInt(),
+            configuration.get("monsterDensity").getAsInt(),
+            configuration.get("size").getAsInt(),
+            configuration.get("hardcoreSanity").getAsBoolean(),
+            parent.getAllMembers().size()
+        ).setParent(parent);
     }
 }

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/BackroomsGame.java

@@ -0,0 +1,663 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms;
+
+import eu.mhsl.minenet.minigames.instance.Dimension;
+import eu.mhsl.minenet.minigames.instance.game.stateless.StatelessGame;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.ambience.AmbienceEngine;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.door.DoorManager;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.generator.BackroomsChunkGenerator;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.generator.MazeAlgorithms;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.item.BackroomsItems;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelDefinition;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelLayout;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelType;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.TransitionType;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.impl.Level0Lobby;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.impl.LevelFinale;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.impl.LevelFun;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.impl.LevelHabitableZone;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.impl.LevelLightsOut;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.impl.LevelPipeDreams;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.impl.LevelPoolrooms;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.loot.ChestManager;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.BackroomsMonster;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.sanity.SanityManager;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.transition.TransitionManager;
+import eu.mhsl.minenet.minigames.message.Icon;
+import eu.mhsl.minenet.minigames.message.component.TranslatedComponent;
+import eu.mhsl.minenet.minigames.message.type.ChatMessage;
+import eu.mhsl.minenet.minigames.message.type.TitleMessage;
+import net.kyori.adventure.sound.Sound;
+import java.time.Duration;
+import net.kyori.adventure.text.Component;
+import net.minestom.server.MinecraftServer;
+import net.minestom.server.coordinate.Pos;
+import net.minestom.server.entity.GameMode;
+import net.minestom.server.entity.Player;
+import net.minestom.server.event.entity.EntityAttackEvent;
+import net.minestom.server.event.entity.EntityDamageEvent;
+import net.minestom.server.event.player.PlayerBlockInteractEvent;
+import net.minestom.server.event.player.PlayerMoveEvent;
+import net.minestom.server.event.player.PlayerUseItemEvent;
+import net.minestom.server.instance.LightingChunk;
+import net.minestom.server.entity.attribute.Attribute;
+import net.minestom.server.entity.damage.DamageType;
+import net.minestom.server.item.ItemStack;
+import net.minestom.server.potion.Potion;
+import net.minestom.server.potion.PotionEffect;
+import net.minestom.server.scoreboard.Sidebar;
+import net.minestom.server.sound.SoundEvent;
+import net.minestom.server.timer.ExecutionType;
+import net.minestom.server.timer.TaskSchedule;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Random;
+import java.util.Set;
+import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
+import java.util.function.Supplier;
+
+/**
+ * Backrooms: Wettlauf durch prozedural generierte, vertikal gestapelte Horror-Level.
+ * Wer zuerst durch alle Level entkommt gewinnt; sterben alle anderen, gewinnt der
+ * letzte Ueberlebende. Kein Spieler-Schaden untereinander — nur die Backrooms selbst.
+ */
+public class BackroomsGame extends StatelessGame {
+    /** Zufalls-Pool der Zwischen-Level; wird mit jedem fertigen Leveltyp erweitert. */
+    private static final List<Supplier<LevelDefinition>> LEVEL_POOL = List.of(
+        LevelHabitableZone::new,
+        LevelPipeDreams::new,
+        LevelPoolrooms::new,
+        LevelLightsOut::new,
+        LevelFun::new
+    );
+
+    private final List<LevelRuntime> levels = new ArrayList<>();
+    private final Map<UUID, BackroomsPlayer> playerStates = new HashMap<>();
+    private final Map<UUID, Sidebar> sidebars = new HashMap<>();
+
+    private final int lives;
+    private final int monsterDensity;
+    private final boolean hardcoreSanity;
+
+    private final TransitionManager transitionManager = new TransitionManager(this);
+    private final ChestManager chestManager;
+    private final DoorManager doorManager = new DoorManager(this);
+    private final SanityManager sanityManager;
+    private final AmbienceEngine ambienceEngine = new AmbienceEngine(this);
+
+    private final Set<Integer> openedDoorLevels = new HashSet<>();
+
+    private long tickCounter = 0;
+    private long secondCounter = 0;
+
+    public BackroomsGame(int totalLevels, int lives, int monsterDensity, int sizeOption, boolean hardcoreSanity, int expectedPlayers) {
+        super(Dimension.BACKROOMS.key, "Backrooms", new BackroomsScore());
+        this.getScore().setIgnoreLastPlayers(1);
+        this.lives = lives;
+        this.monsterDensity = monsterDensity;
+        this.hardcoreSanity = hardcoreSanity;
+        this.sanityManager = new SanityManager(this, hardcoreSanity);
+
+        int cells = this.cellsForSize(sizeOption, expectedPlayers);
+
+        List<LevelDefinition> sequence = this.buildSequence(totalLevels);
+        for(int i = 0; i < sequence.size(); i++) {
+            LevelDefinition definition = sequence.get(i);
+            Random layoutRnd = new Random(this.rnd.nextLong());
+            var layout = definition.buildLayout(layoutRnd, cells, expectedPlayers);
+            this.levels.add(new LevelRuntime(this, i, definition, layout, layoutRnd));
+        }
+
+        this.connectShaftLandings();
+        // Echte Lichtberechnung: nur die Deckenlampen leuchten, Blackout-Biome sind
+        // tatsaechlich dunkel (Dimension-Ambient ist fast schwarz)
+        this.setChunkSupplier(LightingChunk::new);
+        this.setGenerator(new BackroomsChunkGenerator(this.levels));
+        this.chestManager = new ChestManager(this);
+
+        this.eventNode()
+            .addListener(PlayerBlockInteractEvent.class, event -> {
+                this.chestManager.onInteract(event);
+                this.doorManager.onInteract(event);
+            })
+            .addListener(PlayerUseItemEvent.class, this::onUseItem)
+            .addListener(EntityAttackEvent.class, this::onEntityAttack)
+            .addListener(EntityDamageEvent.class, this::onEntityDamage);
+    }
+
+    /**
+     * HOLE/LADDER-Schaechte enden im Level darunter an einer beliebigen Zelle.
+     * Die Landezelle wird freigeraeumt und per kuerzestem Wanddurchbruch mit dem
+     * Labyrinth verbunden, damit niemand in einer Wandtasche landet.
+     */
+    private void connectShaftLandings() {
+        for(int i = 0; i < this.levels.size() - 1; i++) {
+            LevelRuntime upper = this.levels.get(i);
+            TransitionType transition = upper.getDefinition().transitionType();
+            if(transition != TransitionType.HOLE && transition != TransitionType.LADDER) continue;
+
+            int[] exit = upper.getLayout().getExitCell();
+            if(exit == null) continue;
+
+            var lowerLayout = this.levels.get(i + 1).getLayout();
+            int landingX = lowerLayout.cellX(upper.getLayout().worldX(exit[0]) + 1);
+            int landingZ = lowerLayout.cellZ(upper.getLayout().worldZ(exit[1]) + 1);
+            if(!lowerLayout.inBounds(landingX, landingZ)) continue;
+            if(lowerLayout.isWalkable(landingX, landingZ)) continue;
+
+            lowerLayout.setCell(landingX, landingZ, LevelLayout.Cell.FLOOR);
+            MazeAlgorithms.ensureConnected(
+                lowerLayout,
+                lowerLayout.getSpawnCells().getFirst(),
+                List.of(new int[]{landingX, landingZ})
+            );
+        }
+    }
+
+    private int cellsForSize(int sizeOption, int expectedPlayers) {
+        int cells = switch(sizeOption) {
+            case 1 -> 25;
+            case 2 -> 37;
+            case 3 -> 49;
+            // Auto: waechst mit der Wurzel der Spielerzahl, damit 50 Spieler nicht clustern
+            default -> 23 + 5 * (int) Math.ceil(Math.sqrt(Math.max(1, expectedPlayers)));
+        };
+        cells = Math.min(63, cells);
+        return cells % 2 == 0 ? cells + 1 : cells;
+    }
+
+    private List<LevelDefinition> buildSequence(int totalLevels) {
+        List<LevelDefinition> sequence = new ArrayList<>();
+        sequence.add(new Level0Lobby());
+
+        List<Supplier<LevelDefinition>> pool = new ArrayList<>(LEVEL_POOL);
+        Collections.shuffle(pool, this.rnd);
+        int middleCount = Math.max(0, totalLevels - 2);
+        for(int i = 0; i < middleCount; i++) {
+            // Pool leer oder aufgebraucht: Lobby-Varianten als Fallback
+            sequence.add(i < pool.size() ? pool.get(i).get() : new Level0Lobby());
+        }
+
+        sequence.add(new LevelFinale());
+        return sequence;
+    }
+
+    public List<LevelRuntime> getLevels() {
+        return this.levels;
+    }
+
+    public Random rnd() {
+        return this.rnd;
+    }
+
+    public BackroomsPlayer playerState(Player player) {
+        return this.playerStates.get(player.getUuid());
+    }
+
+    public List<Player> playersInLevel(int index) {
+        return this.getPlayers().stream()
+            .filter(player -> player.getGameMode() == GameMode.ADVENTURE)
+            .filter(player -> {
+                BackroomsPlayer state = this.playerState(player);
+                return state != null && state.getLevelIndex() == index;
+            })
+            .toList();
+    }
+
+    public boolean isDoorOpened(int levelIndex) {
+        return this.openedDoorLevels.contains(levelIndex);
+    }
+
+    /**
+     * Erster Spieler oeffnet die Tuer: Nachricht an alle, die Keys dieses Levels
+     * zerfallen — und alle Spieler im Level bekommen automatisch einen Kompass,
+     * um schnell nachzukommen.
+     */
+    public void markDoorOpened(int levelIndex) {
+        if(!this.openedDoorLevels.add(levelIndex)) return;
+
+        this.getPlayers().forEach(player ->
+            BackroomsItems.removeMatching(player, item -> BackroomsItems.isKeyFor(item, levelIndex))
+        );
+
+        this.playersInLevel(levelIndex).forEach(player -> this.chestManager.giveCompassIfMissing(player, levelIndex));
+
+        new ChatMessage(Icon.INFO)
+            .appendTranslated("game_Backrooms#doorOpened")
+            .send(this.playersInLevel(levelIndex));
+    }
+
+    public LevelRuntime levelAt(int y) {
+        for(LevelRuntime level : this.levels) {
+            if(y >= level.getBaseY() && y < level.getBaseY() + LevelRuntime.LEVEL_HEIGHT) return level;
+        }
+        return null;
+    }
+
+    @Override
+    protected void onLoad(@NotNull CompletableFuture<Void> callback) {
+        callback.complete(null);
+    }
+
+    @Override
+    protected void onStart() {
+        // onStart laeuft in einem CompletableFuture — jede unbehandelte Exception wuerde
+        // lautlos verschluckt und ALLE Spielsysteme (Monster, Events, Sanity) blieben tot.
+        // Deshalb: alles einzeln kapseln und Fehler laut ins Log schreiben.
+        try {
+            this.getPlayers().forEach(player -> {
+                try {
+                    this.playerStates.put(player.getUuid(), new BackroomsPlayer(this.lives));
+                    player.setExp(1f);
+                    player.setFood(20);
+                    player.setFoodSaturation(0);
+                    this.createSidebar(player);
+                } catch(Exception e) {
+                    this.logger.severe("player setup failed for " + player.getUsername() + ": " + e);
+                    MinecraftServer.getExceptionManager().handleException(e);
+                }
+            });
+
+            for(LevelRuntime level : this.levels) {
+                try {
+                    level.getDefinition().populateMonsters(this, level, this.monsterDensity);
+                    this.logger.info("Backrooms level " + level.getIndex() + " ("
+                        + level.getDefinition().type() + "): " + level.getMonsters().size() + " monsters spawned");
+                } catch(Exception e) {
+                    this.logger.severe("populateMonsters failed for level " + level.getIndex() + ": " + e);
+                    MinecraftServer.getExceptionManager().handleException(e);
+                }
+            }
+
+            // Zentraler Spiel-Tick: Monster-AI (nur Level mit Spielern), No-Clip-Erkennung, Dunkelheits-Effekte
+            this.scheduler().submitTask(() -> {
+                if(!this.isRunning()) return TaskSchedule.stop();
+                this.tickCounter += 2;
+
+                for(LevelRuntime level : this.levels) {
+                    List<Player> playersInLevel = level.playersInLevel();
+                    if(playersInLevel.isEmpty()) continue;
+                    for(BackroomsMonster monster : List.copyOf(level.getMonsters())) {
+                        if(monster.isRemoved() || monster.isDead()) {
+                            monster.remove();
+                            level.getMonsters().remove(monster);
+                            continue;
+                        }
+                        // Spawn laeuft asynchron ueber loadChunk — bis dahin nicht ticken
+                        if(monster.getInstance() == null) continue;
+                        // Nur in Spielernaehe ticken: dort sind die Chunks garantiert geladen,
+                        // sonst wirft der Pathfinder auf ungeladenen Chunks NPEs
+                        boolean playerNear = playersInLevel.stream().anyMatch(player -> monster.getDistance(player) < 48);
+                        if(!playerNear) continue;
+                        try {
+                            monster.monsterTick(this.tickCounter);
+                        } catch(Exception e) {
+                            // Ein einziges kaputtes Monster darf nicht den ganzen AI-Task toeten
+                            this.logger.severe("monsterTick failed, removing monster " + monster.getEntityType() + ": " + e);
+                            MinecraftServer.getExceptionManager().handleException(e);
+                            monster.remove();
+                        }
+                    }
+                }
+
+                if(this.tickCounter % 10 == 0) {
+                    this.getPlayers().stream()
+                        .filter(player -> player.getGameMode() == GameMode.ADVENTURE)
+                        .forEach(player -> {
+                            try {
+                                this.transitionManager.onTick(player);
+                                this.applyDarkness(player);
+                            } catch(Exception e) {
+                                MinecraftServer.getExceptionManager().handleException(e);
+                            }
+                        });
+                }
+
+                return TaskSchedule.tick(2);
+            }, ExecutionType.TICK_START);
+
+            // Level-Events (Blackouts, Finale-Todeszone) + Monster-Director im Sekundentakt
+            this.scheduler().submitTask(() -> {
+                if(!this.isRunning()) return TaskSchedule.stop();
+                this.secondCounter++;
+                this.getPlayers().stream()
+                    .filter(player -> player.getGameMode() == GameMode.ADVENTURE)
+                    .forEach(player -> {
+                        try {
+                            this.tickHunger(player);
+                        } catch(Exception e) {
+                            // darf den Level-Event-Task nicht dauerhaft toeten
+                            MinecraftServer.getExceptionManager().handleException(e);
+                        }
+                    });
+                for(LevelRuntime level : this.levels) {
+                    if(level.playersInLevel().isEmpty()) continue;
+                    try {
+                        level.getDefinition().onLevelTick(this, level);
+                        if(this.secondCounter % 5 == 0) this.directMonsters(level);
+                    } catch(Exception e) {
+                        this.logger.severe("onLevelTick failed for level " + level.getIndex() + ": " + e);
+                        MinecraftServer.getExceptionManager().handleException(e);
+                    }
+                }
+                return TaskSchedule.seconds(1);
+            }, ExecutionType.TICK_END);
+
+            this.sanityManager.start();
+            this.ambienceEngine.start();
+            this.setTimeLimit(600 + this.levels.size() * 60);
+        } catch(Exception e) {
+            this.logger.severe("BackroomsGame.onStart failed: " + e);
+            MinecraftServer.getExceptionManager().handleException(e);
+        }
+    }
+
+    /**
+     * Sprinten kostet Hunger (sichtbar durch den Hunger-Effekt); unter 7 Punkten
+     * verweigert der Client das Sprinten von selbst. Der Vorrat reicht fuer rund
+     * 30 Sekunden Dauersprint; ohne Sprint regeneriert er langsam, Energy Bars
+     * fuellen ihn schnell.
+     */
+    private void tickHunger(Player player) {
+        if(player.isSprinting()) {
+            if(this.secondCounter % 2 == 0) player.setFood(Math.max(0, player.getFood() - 1));
+            player.addEffect(new Potion(PotionEffect.HUNGER, (byte) 0, 35));
+        } else if(this.secondCounter % 3 == 0) {
+            player.setFood(Math.min(20, player.getFood() + 1));
+        }
+    }
+
+    /**
+     * Monster-Director: haelt die Monsterpopulation in Spielernaehe. Roaming-Monster
+     * spawnen 6-14 Zellen (18-42 Bloecke) neben einem zufaelligen Spieler und despawnen,
+     * sobald sie von allen Spielern des Levels > 64 Bloecke entfernt sind. Fest platzierte
+     * Monster (Fallen wie Clumps, Smiler-Nester) bleiben bestehen.
+     */
+    private void directMonsters(LevelRuntime level) {
+        List<Player> players = level.playersInLevel();
+        if(players.isEmpty()) return;
+
+        for(BackroomsMonster monster : List.copyOf(level.getMonsters())) {
+            if(monster.isRemoved() || !monster.isRoaming() || monster.getInstance() == null) continue;
+            boolean anyoneNear = players.stream().anyMatch(player -> monster.getDistance(player) < 64);
+            if(!anyoneNear) {
+                monster.remove();
+                level.getMonsters().remove(monster);
+            }
+        }
+
+        long active = level.getMonsters().stream().filter(monster -> !monster.isRemoved()).count();
+        int target = this.monsterDensity + players.size();
+        if(active >= target) return;
+
+        var layout = level.getLayout();
+        for(int attempt = 0; attempt < 10 && active < target; attempt++) {
+            Player anchor = players.get(this.rnd.nextInt(players.size()));
+            int cx = layout.cellX(anchor.getPosition().x()) + this.randomOffset(6, 14);
+            int cz = layout.cellZ(anchor.getPosition().z()) + this.randomOffset(6, 14);
+            if(!layout.isWalkable(cx, cz)) continue;
+
+            // Nicht neben ein bereits vorhandenes Monster spawnen — sonst klumpen sie
+            Pos candidate = level.toPlayerPos(new int[]{cx, cz});
+            boolean crowded = level.getMonsters().stream()
+                .anyMatch(other -> !other.isRemoved() && other.getInstance() != null
+                    && other.getPosition().distance(candidate) < 12);
+            if(crowded) continue;
+
+            BackroomsMonster monster = level.getDefinition().createRoamingMonster(level, new int[]{cx, cz});
+            if(monster == null) continue;
+            monster.setRoaming(true);
+            monster.spawnAtCell(this, new int[]{cx, cz});
+            level.getMonsters().add(monster);
+            active++;
+        }
+    }
+
+    private int randomOffset(int min, int max) {
+        int magnitude = min + this.rnd.nextInt(max - min + 1);
+        return this.rnd.nextBoolean() ? magnitude : -magnitude;
+    }
+
+    /**
+     * DARKNESS-Effekt nur noch fuer Blackout-Events (ploetzlicher Lichtausfall) —
+     * dauerhaft dunkle Bereiche inkl. Lights Out verdunkelt bereits die echte
+     * Lichtberechnung; beides zusammen waere komplett blind.
+     */
+    private void applyDarkness(Player player) {
+        BackroomsPlayer state = this.playerState(player);
+        if(state == null) return;
+        LevelRuntime level = this.levels.get(state.getLevelIndex());
+        if(level.isBlackoutActive()) player.addEffect(new Potion(PotionEffect.DARKNESS, (byte) 0, 40));
+    }
+
+    @Override
+    protected void onStop() {
+        // Sidebars abrauemen — sonst nehmen die Spieler das Scoreboard mit in die Lobby
+        this.sidebars.values().forEach(sidebar ->
+            Set.copyOf(sidebar.getViewers()).forEach(sidebar::removeViewer)
+        );
+        this.sidebars.clear();
+
+        // Leben und Hunger zuruecksetzen — der Lobby-Reset des Frameworks macht das nicht
+        this.getPlayers().forEach(this::restoreVitals);
+    }
+
+    @Override
+    protected void onPlayerLeave(Player player) {
+        Sidebar sidebar = this.sidebars.remove(player.getUuid());
+        if(sidebar != null) sidebar.removeViewer(player);
+        this.restoreVitals(player);
+        super.onPlayerLeave(player);
+    }
+
+    private void restoreVitals(Player player) {
+        player.setHealth((float) player.getAttributeValue(Attribute.MAX_HEALTH));
+        player.setFood(20);
+        player.setFoodSaturation(5);
+    }
+
+    @Override
+    protected void onPlayerMove(@NotNull PlayerMoveEvent event) {
+        if(this.isBeforeBeginning) {
+            // Vor dem Start eingefroren: Umschauen erlaubt, Position bleibt fix
+            if(!event.getNewPosition().samePoint(event.getPlayer().getPosition())) {
+                event.setCancelled(true);
+            }
+            return;
+        }
+        this.transitionManager.onMove(event.getPlayer(), event.getNewPosition());
+    }
+
+    private void onUseItem(PlayerUseItemEvent event) {
+        Player player = event.getPlayer();
+        ItemStack item = event.getItemStack();
+
+        if(BackroomsItems.is(item, BackroomsItems.ALMOND_WATER)) {
+            event.setCancelled(true);
+            this.consumeOne(player, event);
+            this.sanityManager.restore(player, 0.4);
+            float maxHealth = (float) player.getAttributeValue(Attribute.MAX_HEALTH);
+            player.setHealth(Math.min(maxHealth, player.getHealth() + 4));
+            player.playSound(Sound.sound(SoundEvent.ENTITY_GENERIC_DRINK, Sound.Source.PLAYER, 1f, 1f), Sound.Emitter.self());
+        } else if(BackroomsItems.is(item, BackroomsItems.ENERGY_BAR)) {
+            event.setCancelled(true);
+            this.consumeOne(player, event);
+            player.setFood(Math.min(20, player.getFood() + 8));
+            player.playSound(Sound.sound(SoundEvent.ENTITY_PLAYER_BURP, Sound.Source.PLAYER, 1f, 1f), Sound.Emitter.self());
+        }
+    }
+
+    private void consumeOne(Player player, PlayerUseItemEvent event) {
+        ItemStack item = event.getItemStack();
+        player.setItemInHand(event.getHand(), item.withAmount(item.amount() - 1));
+    }
+
+    /** Spieler duerfen Monster schlagen (zurueckdraengen), aber keine anderen Spieler. */
+    private void onEntityAttack(EntityAttackEvent event) {
+        if(!(event.getEntity() instanceof Player attacker)) return;
+        if(!(event.getTarget() instanceof BackroomsMonster monster)) return;
+        if(this.isBeforeBeginning) return;
+
+        monster.damage(DamageType.PLAYER_ATTACK, 3);
+        var knockback = monster.getPosition().sub(attacker.getPosition()).asVec().withY(0).normalize().mul(8).withY(4);
+        monster.setVelocity(monster.getVelocity().add(knockback));
+    }
+
+    /** Hit-Delay + Abfangen toedlichen Schadens fuer die Leben-Logik. */
+    private void onEntityDamage(EntityDamageEvent event) {
+        if(!(event.getEntity() instanceof Player player)) return;
+        BackroomsPlayer state = this.playerState(player);
+        if(state == null || state.isEliminated() || state.isEscaped()) {
+            event.setCancelled(true);
+            return;
+        }
+
+        // Immunitaetsfenster wie Vanilla: ohne PvP-Lib gibt es sonst keinen Hit-Delay
+        long now = System.currentTimeMillis();
+        if(now - state.getLastDamageMillis() < 500) {
+            event.setCancelled(true);
+            return;
+        }
+        state.setLastDamageMillis(now);
+
+        if(event.getDamage().getAmount() < player.getHealth()) return;
+        event.setCancelled(true);
+        this.handleDeath(player, state);
+    }
+
+    private void handleDeath(Player player, BackroomsPlayer state) {
+        state.loseLife();
+        player.setHealth((float) player.getAttributeValue(Attribute.MAX_HEALTH));
+
+        if(state.getLives() <= 0) {
+            state.setEliminated(true);
+            player.setGameMode(GameMode.SPECTATOR);
+            new TitleMessage(Duration.ofSeconds(2)).appendTranslated("game_Backrooms#eliminated").send(player);
+            this.playSound(Sound.sound(SoundEvent.ENTITY_WITHER_SPAWN, Sound.Source.HOSTILE, 0.4f, 0.6f));
+            this.getScore().insertResult(player);
+            this.updateSidebars();
+            return;
+        }
+
+        // Respawn an zufaelliger Position im aktuellen Level; nur Schluessel bleiben im Inventar
+        this.stripInventoryExceptKeys(player);
+        LevelRuntime level = this.levels.get(state.getLevelIndex());
+        // Im Finale bekommt der Respawn eine frische persoenliche Jagd samt Vorsprung
+        if(level.getDefinition().type() == LevelType.FINALE) {
+            state.setFinaleSeconds(BackroomsPlayer.FINALE_NOT_STARTED);
+            state.setFinaleZoneX(Double.NEGATIVE_INFINITY);
+        }
+        player.teleport(level.randomSpawn());
+        player.addEffect(new Potion(PotionEffect.RESISTANCE, (byte) 4, 60));
+        player.addEffect(new Potion(PotionEffect.BLINDNESS, (byte) 0, 40));
+        player.playSound(Sound.sound(SoundEvent.ENTITY_ELDER_GUARDIAN_CURSE, Sound.Source.HOSTILE, 1f, 0.5f), Sound.Emitter.self());
+        new TitleMessage(Duration.ofSeconds(1)).appendTranslated("game_Backrooms#died").send(player);
+        this.updateSidebars();
+    }
+
+    private void stripInventoryExceptKeys(Player player) {
+        BackroomsItems.removeMatching(player, item -> !item.isAir()
+            && !BackroomsItems.is(item, BackroomsItems.LEVEL_KEY)
+            && !BackroomsItems.is(item, BackroomsItems.DOOR_COMPASS));
+    }
+
+    /** Uebergang ins naechste Level (durch Fall, Glitch-Boden oder No-Clip-Wand). */
+    public void advanceLevel(Player player, boolean teleport) {
+        BackroomsPlayer state = this.playerState(player);
+        if(state == null) return;
+        int previous = state.getLevelIndex();
+        int next = previous + 1;
+        if(next >= this.levels.size()) return;
+        state.setLevelIndex(next);
+        state.setLevelEnteredMillis(System.currentTimeMillis());
+
+        // Key und Kompass des alten Levels sind hier wertlos — weg damit
+        BackroomsItems.removeMatching(player, item -> BackroomsItems.isDoorItemFor(item, previous));
+
+        LevelRuntime level = this.levels.get(next);
+        // Ins Finale steigt man immer am Korridor-Anfang ein — sonst wuerde der
+        // Fall-Schacht mitten auf der Rennstrecke enden
+        boolean isFinale = level.getDefinition().type() == LevelType.FINALE;
+        if(teleport || isFinale) player.teleport(level.randomSpawn());
+
+        // Ist die Tuer dieses Levels schon offen, gibt es den Kompass zum Nachkommen
+        if(this.isDoorOpened(next)) this.chestManager.giveCompassIfMissing(player, next);
+
+        // Sichtbarkeitsregeln werden nur beim Aufruf ausgewertet — fuer den neuen
+        // Spieler im Level muessen alle Monster ihre Viewer neu berechnen, sonst
+        // bleiben sie fuer ihn unsichtbar (greifen aber serverseitig an)
+        level.getMonsters().forEach(monster -> {
+            if(!monster.isRemoved()) monster.updateViewableRule();
+        });
+
+        player.addEffect(new Potion(PotionEffect.BLINDNESS, (byte) 0, 40));
+        player.playSound(Sound.sound(SoundEvent.BLOCK_PORTAL_TRAVEL, Sound.Source.AMBIENT, 0.4f, 0.5f), Sound.Emitter.self());
+        new TitleMessage(Duration.ofSeconds(2))
+            .appendTranslated(level.getDefinition().type().translationKey())
+            .send(player);
+        this.updateSidebars();
+    }
+
+    /** Der Spieler hat das Finale durchquert und ist entkommen. */
+    public void escape(Player player) {
+        BackroomsPlayer state = this.playerState(player);
+        if(state == null || state.isEscaped()) return;
+        state.setEscaped(true);
+
+        player.setGameMode(GameMode.SPECTATOR);
+        new TitleMessage(Duration.ofSeconds(3)).appendTranslated("game_Backrooms#escaped").send(player);
+        this.playSound(Sound.sound(SoundEvent.UI_TOAST_CHALLENGE_COMPLETE, Sound.Source.MASTER, 0.8f, 1f));
+        this.getScore().insertResult(player, 1);
+        this.updateSidebars();
+    }
+
+    private void createSidebar(Player player) {
+        Sidebar sidebar = new Sidebar(Component.text("Backrooms"));
+        sidebar.createLine(new Sidebar.ScoreboardLine("level", this.sidebarLevelLine(player), 2));
+        sidebar.createLine(new Sidebar.ScoreboardLine("lives", this.sidebarLivesLine(player), 1));
+        sidebar.createLine(new Sidebar.ScoreboardLine("players", this.sidebarPlayersLine(), 0));
+        sidebar.addViewer(player);
+        this.sidebars.put(player.getUuid(), sidebar);
+    }
+
+    private Component sidebarLevelLine(Player player) {
+        BackroomsPlayer state = this.playerState(player);
+        int index = state == null ? 0 : state.getLevelIndex();
+        return TranslatedComponent.byId(this.levels.get(index).getDefinition().type().translationKey()).getAssembled(player);
+    }
+
+    private Component sidebarLivesLine(Player player) {
+        BackroomsPlayer state = this.playerState(player);
+        return Component.text("❤ " + (state == null ? this.lives : Math.max(0, state.getLives())));
+    }
+
+    private Component sidebarPlayersLine() {
+        long active = this.playerStates.values().stream()
+            .filter(state -> !state.isEliminated() && !state.isEscaped())
+            .count();
+        return Component.text("☠ " + active);
+    }
+
+    private void updateSidebars() {
+        this.getPlayers().forEach(player -> {
+            Sidebar sidebar = this.sidebars.get(player.getUuid());
+            if(sidebar == null) return;
+            sidebar.updateLineContent("level", this.sidebarLevelLine(player));
+            sidebar.updateLineContent("lives", this.sidebarLivesLine(player));
+            sidebar.updateLineContent("players", this.sidebarPlayersLine());
+        });
+    }
+
+    @Override
+    public Pos getSpawn() {
+        // Jeder Spieler bekommt einen zufaelligen, weit gestreuten Spawn in Level 0
+        return this.levels.getFirst().randomSpawn();
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/BackroomsGenerator.java

@@ -1,87 +0,0 @@
-package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms;
-
-import net.minestom.server.instance.block.Block;
-import net.minestom.server.instance.generator.GenerationUnit;
-import net.minestom.server.instance.generator.UnitModifier;
-
-import java.util.concurrent.ThreadLocalRandom;
-
-public class BackroomsGenerator {
-    public void generateRoom(GenerationUnit unit, int y) {
-        var modifier = unit.modifier();
-        var start = unit.absoluteStart();
-        var yPos = start.blockY() + y;
-
-        for(int x = 0; x < unit.size().blockX(); x++) {
-            for(int z = 0; z < unit.size().blockZ(); z++) {
-                var xPos = start.blockX() + x;
-                var zPos = start.blockZ() + z;
-
-                modifier.setBlock(xPos, yPos - 1, zPos, Block.BEDROCK);
-                modifier.setBlock(xPos, yPos + 5, zPos, Block.BEDROCK);
-
-                modifier.setBlock(xPos, yPos, zPos, Block.LIGHT_GRAY_WOOL);
-                modifier.setBlock(xPos, yPos + 4, zPos, Block.SMOOTH_STONE_SLAB);
-
-                // idk man... dont ask about this
-                if(
-                    (x - 2) % 4 == 0 && (
-                        ((z - 2) % 8 == 0) ||
-                            ((z - 2) % 8 == 1) ||
-                            ((z - 2) % 8 == 3) ||
-                            ((z - 2) % 8 == 4)
-                    )
-                ) {
-                    modifier.setBlock(xPos, yPos + 4, zPos, Block.SEA_LANTERN);
-                }
-            }
-        }
-
-        this.generateWalls(modifier, start.blockX(), yPos + 1, start.blockZ());
-        this.generateWalls(modifier, start.blockX() + 8, yPos + 1, start.blockZ());
-        this.generateWalls(modifier, start.blockX(), yPos + 1, start.blockZ() + 8);
-        this.generateWalls(modifier, start.blockX() + 8, yPos + 1, start.blockZ() + 8);
-    }
-
-    private void generateWalls(UnitModifier modifier, int xPos, int yPos, int zPos) {
-        this.generatePillar(modifier, xPos, yPos, zPos, Block.CHISELED_SANDSTONE);
-
-        var random = ThreadLocalRandom.current();
-
-        var wall1 = random.nextInt(4) != 0;
-        var wall2 = random.nextInt(4) != 0;
-        var door1 = random.nextInt(2) != 0;
-        var door2 = random.nextInt(2) != 0;
-
-        var door1pos = random.nextInt(2, 6);
-        var door2pos = random.nextInt(2, 6);
-
-        if(wall1) {
-            for(int x = xPos; x < xPos + 8; x++) {
-                this.generatePillar(modifier, x, yPos, zPos, Block.SMOOTH_SANDSTONE);
-            }
-        }
-
-        if(wall2) {
-            for(int z = zPos; z < zPos + 8; z++) {
-                this.generatePillar(modifier, xPos, yPos, z, Block.SMOOTH_SANDSTONE);
-            }
-        }
-
-        if(door1 && wall1) {
-            this.generatePillar(modifier, xPos + door1pos, yPos, zPos, Block.AIR);
-            this.generatePillar(modifier, xPos + door1pos + 1, yPos, zPos, Block.AIR);
-        }
-
-        if(door2 && wall2) {
-            this.generatePillar(modifier, xPos, yPos, zPos + door2pos, Block.AIR);
-            this.generatePillar(modifier, xPos, yPos, zPos + door2pos + 1, Block.AIR);
-        }
-    }
-
-    private void generatePillar(UnitModifier modifier, int xPos, int yPos, int zPos, Block material) {
-        for(int y = yPos; y < yPos + 3; y++) {
-            modifier.setBlock(xPos, y, zPos, material);
-        }
-    }
-}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/BackroomsPlayer.java

@@ -0,0 +1,96 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms;
+
+/**
+ * Laufzeit-Zustand eines Spielers: Leben, aktuelles Level, Sanity und Fortschritt.
+ */
+public class BackroomsPlayer {
+    private int lives;
+    private int levelIndex = 0;
+    private double sanity = 1.0;
+    private boolean escaped = false;
+    private boolean eliminated = false;
+    private long lastDamageMillis = 0;
+    private long levelEnteredMillis = System.currentTimeMillis();
+
+    // Persoenlicher Finale-Zustand: jeder Spieler hat seine eigene Verfolgungsjagd
+    public static final int FINALE_NOT_STARTED = Integer.MIN_VALUE;
+    private int finaleSeconds = FINALE_NOT_STARTED;
+    private double finaleZoneX = Double.NEGATIVE_INFINITY;
+
+    public BackroomsPlayer(int lives) {
+        this.lives = lives;
+    }
+
+    public int getLives() {
+        return this.lives;
+    }
+
+    public void loseLife() {
+        this.lives--;
+    }
+
+    public int getLevelIndex() {
+        return this.levelIndex;
+    }
+
+    public void setLevelIndex(int levelIndex) {
+        this.levelIndex = levelIndex;
+    }
+
+    public double getSanity() {
+        return this.sanity;
+    }
+
+    public void setSanity(double sanity) {
+        this.sanity = sanity;
+    }
+
+    public boolean isEscaped() {
+        return this.escaped;
+    }
+
+    public void setEscaped(boolean escaped) {
+        this.escaped = escaped;
+    }
+
+    public boolean isEliminated() {
+        return this.eliminated;
+    }
+
+    public void setEliminated(boolean eliminated) {
+        this.eliminated = eliminated;
+    }
+
+    public int getFinaleSeconds() {
+        return this.finaleSeconds;
+    }
+
+    public void setFinaleSeconds(int finaleSeconds) {
+        this.finaleSeconds = finaleSeconds;
+    }
+
+    public double getFinaleZoneX() {
+        return this.finaleZoneX;
+    }
+
+    public void setFinaleZoneX(double finaleZoneX) {
+        this.finaleZoneX = finaleZoneX;
+    }
+
+    public long getLevelEnteredMillis() {
+        return this.levelEnteredMillis;
+    }
+
+    public void setLevelEnteredMillis(long levelEnteredMillis) {
+        this.levelEnteredMillis = levelEnteredMillis;
+    }
+
+    public long getLastDamageMillis() {
+        return this.lastDamageMillis;
+    }
+
+    public void setLastDamageMillis(long lastDamageMillis) {
+        this.lastDamageMillis = lastDamageMillis;
+    }
+
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/BackroomsScore.java

@@ -0,0 +1,58 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms;
+
+import eu.mhsl.minenet.minigames.message.TranslatableMessage;
+import eu.mhsl.minenet.minigames.message.type.TitleMessage;
+import eu.mhsl.minenet.minigames.score.Score;
+import net.minestom.server.entity.Player;
+
+import java.time.Duration;
+import java.util.Set;
+
+/**
+ * Kombi-Wertung: Entkommene stehen in Flucht-Reihenfolge vorn; danach folgen die
+ * Gestorbenen, spaeterer Tod = besserer Platz. Der letzte Ueberlebende (via
+ * insertRemainingPlayers) landet direkt hinter den Entkommenen — gewinnt also,
+ * wenn niemand entkommen ist.
+ */
+public class BackroomsScore extends Score {
+    private int escapedCount = 0;
+
+    /** Entkommen (Punkte-Pfad) */
+    @Override
+    protected void insertResultImplementation(Set<Player> p, int points) {
+        this.getScores().add(this.escapedCount, p);
+        this.escapedCount++;
+    }
+
+    /** Tod bzw. verbliebene Spieler bei Spielende */
+    @Override
+    protected void insertResultImplementation(Set<Player> p) {
+        this.getScores().add(this.escapedCount, p);
+    }
+
+    /**
+     * Wie Score.checkGameEnd, aber mit Untergrenze von einem echten Ergebnis:
+     * mit ignoreLastPlayers=1 und nur einem Spieler wuerde das Spiel sonst
+     * sofort nach dem Start enden (0 &gt;= 1-1).
+     */
+    @Override
+    protected void checkGameEnd() {
+        if(this.isClosed()) return;
+        if(!this.instance.isRunning()) return;
+        if(this.instance.getPlayers().isEmpty()) return;
+
+        int required = Math.max(1, this.instance.getPlayers().size() - this.getIgnoreLastPlayers());
+        if(this.resultCount() >= required) {
+            if(this.getIgnoreLastPlayers() > 0) {
+                this.insertRemainingPlayers(this.instance.getPlayers());
+            } else {
+                this.setDone();
+            }
+        }
+    }
+
+    @Override
+    protected TranslatableMessage scoreMessage() {
+        return new TitleMessage(Duration.ofMillis(1000), Duration.ofSeconds(1)).appendTranslated("score#finish");
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/BackroomsSmokeTest.java

@@ -0,0 +1,43 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms;
+
+import eu.mhsl.minenet.minigames.instance.Dimension;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import net.minestom.server.Auth;
+import net.minestom.server.MinecraftServer;
+
+/**
+ * Wegwerf-Smoke-Test (headless, ohne Client): baut ein Spiel, spawnt die Monster
+ * und prueft, ob sie tatsaechlich in der Instanz landen. Wird nach der Diagnose geloescht.
+ */
+public class BackroomsSmokeTest {
+    public static void main(String[] args) throws Exception {
+        MinecraftServer server = MinecraftServer.init(new Auth.Offline());
+        Dimension.values();
+        server.start("127.0.0.1", 25599);
+
+        BackroomsGame game = new BackroomsGame(4, 3, 2, 0, false, 8);
+
+        for(LevelRuntime level : game.getLevels()) {
+            System.out.println("[SMOKE] Level " + level.getIndex() + " = " + level.getDefinition().type()
+                + ", baseY=" + level.getBaseY()
+                + ", cells=" + level.getLayout().getCells()
+                + ", spawns=" + level.getLayout().getSpawnCells().size()
+                + ", chests=" + level.getLayout().getChestCells().size()
+                + ", exit=" + java.util.Arrays.toString(level.getLayout().getExitCell()));
+            level.getDefinition().populateMonsters(game, level, 2);
+        }
+
+        Thread.sleep(8000);
+
+        for(LevelRuntime level : game.getLevels()) {
+            long inInstance = level.getMonsters().stream().filter(m -> m.getInstance() != null).count();
+            System.out.println("[SMOKE] Level " + level.getIndex() + " (" + level.getDefinition().type() + "): "
+                + level.getMonsters().size() + " Monster erzeugt, " + inInstance + " in der Instanz");
+            level.getMonsters().forEach(m -> System.out.println("[SMOKE]   - " + m.getEntityType()
+                + " @ " + m.getPosition() + " instance=" + (m.getInstance() != null)));
+        }
+
+        System.out.println("[SMOKE] done");
+        System.exit(0);
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/ClumpTriggerTest.java

@@ -0,0 +1,96 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms;
+
+import eu.mhsl.minenet.minigames.instance.Dimension;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.BackroomsMonster;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Clump;
+import net.minestom.server.Auth;
+import net.minestom.server.MinecraftServer;
+import net.minestom.server.entity.GameMode;
+import net.minestom.server.entity.Player;
+import net.minestom.server.network.packet.server.SendablePacket;
+import net.minestom.server.network.player.GameProfile;
+import net.minestom.server.network.player.PlayerConnection;
+
+import java.lang.reflect.Field;
+import java.net.InetSocketAddress;
+import java.net.SocketAddress;
+import java.util.UUID;
+
+/**
+ * Wegwerf-Repro (headless): spawnt einen Clump, stellt einen Dummy-Spieler daneben
+ * und treibt monsterTick von Hand — prueft, ob der Jumpscare-Trigger feuert.
+ */
+public class ClumpTriggerTest {
+    public static void main(String[] args) throws Exception {
+        MinecraftServer server = MinecraftServer.init(new Auth.Offline());
+        Dimension.values();
+        server.start("127.0.0.1", 25598);
+
+        BackroomsGame game = new BackroomsGame(4, 3, 2, 0, false, 8);
+        LevelRuntime level = game.getLevels().getFirst();
+
+        PlayerConnection connection = new PlayerConnection() {
+            @Override
+            public void sendPacket(SendablePacket packet) {
+            }
+
+            @Override
+            public SocketAddress getRemoteAddress() {
+                return new InetSocketAddress("127.0.0.1", 0);
+            }
+        };
+        Player player = new Player(connection, new GameProfile(UUID.randomUUID(), "Testificate"));
+        int[] spawnCell = level.getLayout().getSpawnCells().getFirst();
+        player.setInstance(game, level.toPlayerPos(spawnCell)).join();
+        player.setGameMode(GameMode.ADVENTURE);
+        System.out.println("[REPRO] player instance=" + (player.getInstance() != null) + " gamemode=" + player.getGameMode());
+
+        game.onStart();
+        System.out.println("[REPRO] playerState=" + game.playerState(player));
+
+        Clump clump = new Clump(level) {
+            @Override
+            public void remove() {
+                new Exception("[REPRO] remove() aufgerufen, dead=" + this.isDead() + " health=" + this.getHealth()).printStackTrace(System.out);
+                super.remove();
+            }
+        };
+        try {
+            var position = level.toPlayerPos(spawnCell);
+            for(int dx = -1; dx <= 1; dx++) {
+                for(int dz = -1; dz <= 1; dz++) {
+                    game.loadChunk(position.chunkX() + dx, position.chunkZ() + dz).join();
+                }
+            }
+            System.out.println("[REPRO] chunks loaded, calling setInstance to " + position);
+            clump.setInstance(game, position).join();
+        } catch(Throwable t) {
+            System.out.println("[REPRO] spawn failed:");
+            t.printStackTrace(System.out);
+        }
+        Thread.sleep(1000);
+        System.out.println("[REPRO] clump instance=" + (clump.getInstance() != null) + " pos=" + clump.getPosition() + " removed=" + clump.isRemoved());
+
+        player.teleport(clump.getPosition().add(1.2, 0, 0)).join();
+        Thread.sleep(500);
+        System.out.println("[REPRO] distance=" + clump.getDistance(player));
+        System.out.println("[REPRO] playersInLevel(0)=" + game.playersInLevel(0).size());
+
+        Field stateField = BackroomsMonster.class.getDeclaredField("state");
+        stateField.setAccessible(true);
+        for(long t = 2; t <= 160; t += 2) {
+            clump.monsterTick(t);
+            if(t % 20 == 0) {
+                System.out.println("[REPRO] t=" + t + " state=" + stateField.get(clump)
+                    + " removed=" + clump.isRemoved()
+                    + " velocity=" + clump.getVelocity()
+                    + " playerHealth=" + player.getHealth());
+            }
+            Thread.sleep(50);
+        }
+
+        System.out.println("[REPRO] done");
+        System.exit(0);
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/ambience/AmbienceEngine.java

@@ -0,0 +1,70 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.ambience;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.BackroomsGame;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import net.kyori.adventure.sound.Sound;
+import net.minestom.server.entity.Player;
+import net.minestom.server.sound.SoundEvent;
+import net.minestom.server.timer.ExecutionType;
+import net.minestom.server.timer.TaskSchedule;
+
+import java.util.Random;
+
+/**
+ * Spielt pro Level den Ambience-Loop und seltene positionale One-Shots,
+ * dazu global einen sehr leisen End-Soundtrack. Level ohne Spieler bleiben stumm.
+ */
+public class AmbienceEngine {
+    private final BackroomsGame game;
+    private final Random rnd = new Random();
+    private int secondCounter = 0;
+
+    public AmbienceEngine(BackroomsGame game) {
+        this.game = game;
+    }
+
+    public void start() {
+        this.game.scheduler().submitTask(() -> {
+            if(!this.game.isRunning()) return TaskSchedule.stop();
+            try {
+                this.tick();
+            } catch(Exception e) {
+                // Ein Fehler darf den Ambience-Task nicht dauerhaft toeten
+                net.minestom.server.MinecraftServer.getExceptionManager().handleException(e);
+            }
+            return TaskSchedule.seconds(1);
+        }, ExecutionType.TICK_END);
+    }
+
+    private void tick() {
+        this.secondCounter++;
+
+            for(LevelRuntime level : this.game.getLevels()) {
+                var players = level.playersInLevel();
+                if(players.isEmpty()) continue;
+
+                AmbienceProfile profile = level.getDefinition().ambience();
+                if(this.secondCounter % profile.loopPeriodSeconds() == 0) {
+                    players.forEach(player -> player.playSound(
+                        Sound.sound(profile.loop(), Sound.Source.AMBIENT, profile.loopVolume(), profile.loopPitch()),
+                        Sound.Emitter.self()
+                    ));
+                }
+
+                for(Player player : players) {
+                    if(this.rnd.nextDouble() >= profile.oneShotChancePerSecond()) continue;
+                    if(profile.oneShots().isEmpty()) continue;
+                    SoundEvent oneShot = profile.oneShots().get(this.rnd.nextInt(profile.oneShots().size()));
+                    Jumpscare.playBehind(player, oneShot, Sound.Source.AMBIENT, 5, 0.6f, 0.8f);
+                }
+            }
+
+            // Der End-Soundtrack als kaum hoerbare, unheimliche Untermalung
+            if(this.secondCounter % 180 == 1) {
+                this.game.getPlayers().forEach(player -> player.playSound(
+                    Sound.sound(SoundEvent.MUSIC_END, Sound.Source.MUSIC, 0.05f, 1f),
+                    Sound.Emitter.self()
+                ));
+            }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/ambience/AmbienceProfile.java

@@ -0,0 +1,20 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.ambience;
+
+import net.minestom.server.sound.SoundEvent;
+
+import java.util.List;
+
+/**
+ * Klangprofil eines Levels: wiederkehrender Basis-Loop plus seltene Zufalls-One-Shots
+ * (entfernte Schritte, Knarren, Fluestern ...), die die AmbienceEngine positional
+ * hinter den Spielern abspielt.
+ */
+public record AmbienceProfile(
+    SoundEvent loop,
+    float loopVolume,
+    float loopPitch,
+    int loopPeriodSeconds,
+    List<SoundEvent> oneShots,
+    double oneShotChancePerSecond
+) {
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/ambience/Jumpscare.java

@@ -0,0 +1,81 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.ambience;
+
+import net.kyori.adventure.sound.Sound;
+import net.minestom.server.MinecraftServer;
+import net.minestom.server.coordinate.Pos;
+import net.minestom.server.coordinate.Vec;
+import net.minestom.server.entity.EntityType;
+import net.minestom.server.entity.EquipmentSlot;
+import net.minestom.server.entity.LivingEntity;
+import net.minestom.server.entity.Player;
+import net.minestom.server.instance.Instance;
+import net.minestom.server.item.ItemStack;
+import net.minestom.server.item.Material;
+import net.minestom.server.network.packet.server.play.ChangeGameStatePacket;
+import net.minestom.server.sound.SoundEvent;
+import net.minestom.server.timer.TaskSchedule;
+
+import java.util.List;
+import java.util.Random;
+
+/**
+ * Jumpscare-Rezepte. Alle Methoden sind bewusst kurz und komponierbar:
+ * sound() nur akustisch, visual() mit kurzem Schreckbild, fake() als Sanity-Halluzination.
+ */
+public final class Jumpscare {
+    private static final List<SoundEvent> SCARE_SOUNDS = List.of(
+        SoundEvent.ENTITY_ENDERMAN_SCREAM,
+        SoundEvent.ENTITY_CAT_HISS,
+        SoundEvent.ENTITY_ELDER_GUARDIAN_CURSE,
+        SoundEvent.AMBIENT_CAVE
+    );
+
+    private Jumpscare() {
+    }
+
+    /** Positionsgebundener Sound schraeg hinter dem Spieler. */
+    public static void playBehind(Player player, SoundEvent event, Sound.Source source, double distance, float volume, float pitch) {
+        Pos behind = player.getPosition().sub(player.getPosition().direction().mul(distance));
+        player.playSound(Sound.sound(event, source, volume, pitch), behind.x(), behind.y(), behind.z());
+    }
+
+    /** Lauter Schreckenssound direkt hinter dem Spieler. */
+    public static void sound(Player player, Random rnd) {
+        SoundEvent event = SCARE_SOUNDS.get(rnd.nextInt(SCARE_SOUNDS.size()));
+        playBehind(player, event, Sound.Source.HOSTILE, 3, 1.5f, 0.5f + rnd.nextFloat() * 0.2f);
+    }
+
+    /**
+     * Schreckbild: der Elder-Guardian-Geist blitzt als Fullscreen-Overlay auf,
+     * gleichzeitig erscheint fuer einen Wimpernschlag ein Schaedel direkt vor dem
+     * Gesicht — Doppelschlag aus Overlay und physischem Schreckbild.
+     */
+    public static void visual(Player player, Instance instance) {
+        player.sendPacket(new ChangeGameStatePacket(ChangeGameStatePacket.Reason.PLAYER_ELDER_GUARDIAN_MOB_APPEARANCE, 0f));
+
+        Vec direction = player.getPosition().direction();
+        Pos position = player.getPosition()
+            .add(direction.mul(1.6))
+            .add(0, player.getEyeHeight() - 1.4, 0)
+            .withYaw(player.getPosition().yaw() + 180)
+            .withPitch(0);
+
+        LivingEntity scare = new LivingEntity(EntityType.ARMOR_STAND);
+        scare.updateViewableRule(viewer -> viewer.getUuid().equals(player.getUuid()));
+        scare.setInvisible(true);
+        scare.setNoGravity(true);
+        scare.setEquipment(EquipmentSlot.HELMET, ItemStack.of(Material.WITHER_SKELETON_SKULL));
+        scare.setInstance(instance, position);
+        MinecraftServer.getSchedulerManager().scheduleTask(scare::remove, TaskSchedule.tick(8), TaskSchedule.stop());
+
+        player.playSound(Sound.sound(SoundEvent.ENTITY_ELDER_GUARDIAN_CURSE, Sound.Source.HOSTILE, 1.8f, 0.6f), player.getPosition());
+        player.playSound(Sound.sound(SoundEvent.ENTITY_ENDERMAN_SCREAM, Sound.Source.HOSTILE, 1.2f, 0.5f), player.getPosition());
+    }
+
+
+    /** Harmlose Halluzination bei niedriger Sanity: nur ein Geraeusch, keine Gefahr. */
+    public static void fake(Player player, Random rnd) {
+        SoundEvent event = rnd.nextBoolean() ? SoundEvent.BLOCK_WOODEN_DOOR_CLOSE : SoundEvent.BLOCK_STONE_STEP;
+        playBehind(player, event, Sound.Source.AMBIENT, 4, 0.8f, 0.9f);
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/door/DoorManager.java

@@ -0,0 +1,72 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.door;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.BackroomsGame;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.item.BackroomsItems;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelLayout;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import net.kyori.adventure.sound.Sound;
+import net.minestom.server.entity.Player;
+import net.minestom.server.event.player.PlayerBlockInteractEvent;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.item.ItemStack;
+import net.minestom.server.sound.SoundEvent;
+
+/**
+ * Verschlossene Exit-Kammern: die DOOR-Zelle ist mit IRON_BARS gefuellt und
+ * oeffnet sich nur mit dem Level Key des jeweiligen Levels.
+ */
+public class DoorManager {
+    private final BackroomsGame game;
+
+    public DoorManager(BackroomsGame game) {
+        this.game = game;
+    }
+
+    public void onInteract(PlayerBlockInteractEvent event) {
+        if(!event.getBlock().compare(Block.IRON_DOOR)) return;
+
+        Player player = event.getPlayer();
+        LevelRuntime level = this.game.levelAt(event.getBlockPosition().blockY());
+        if(level == null) return;
+
+        event.setCancelled(true);
+        event.setBlockingItemUse(true);
+
+        ItemStack held = player.getItemInHand(event.getHand());
+        if(!BackroomsItems.isKeyFor(held, level.getIndex())) {
+            player.playSound(Sound.sound(SoundEvent.BLOCK_CHEST_LOCKED, Sound.Source.BLOCK, 1f, 0.7f), player.getPosition());
+            return;
+        }
+
+        // Einzeltuer-Semantik (Finale-Duell-Kammern): Key oeffnet nur DIESE Tuer und wird verbraucht
+        if(level.getDefinition().opensSingleDoors()) {
+            player.setItemInHand(event.getHand(), held.withAmount(held.amount() - 1));
+            this.openSingleDoor(level, event.getBlockPosition().blockX(), event.getBlockPosition().blockZ());
+            player.playSound(Sound.sound(SoundEvent.BLOCK_IRON_DOOR_OPEN, Sound.Source.BLOCK, 1f, 0.6f), player.getPosition());
+            return;
+        }
+
+        this.openDoor(level);
+        this.game.markDoorOpened(level.getIndex());
+        player.playSound(Sound.sound(SoundEvent.BLOCK_IRON_DOOR_OPEN, Sound.Source.BLOCK, 1f, 0.6f), player.getPosition());
+    }
+
+    /** Oeffnet nur die Tuer an der angeklickten Zelle. */
+    private void openSingleDoor(LevelRuntime level, int blockX, int blockZ) {
+        LevelLayout layout = level.getLayout();
+        int cx = layout.cellX(blockX);
+        int cz = layout.cellZ(blockZ);
+        if(layout.cellAt(cx, cz) != LevelLayout.Cell.DOOR) return;
+        int doorX = layout.worldX(cx) + 1;
+        int doorZ = layout.worldZ(cz) + 1;
+        this.game.setBlock(doorX, level.getBaseY() + 2, doorZ, Block.AIR);
+        this.game.setBlock(doorX, level.getBaseY() + 3, doorZ, Block.AIR);
+    }
+
+    /** Oeffnet die Exit-Kammer-Tuer des Levels (Position kennt das Layout). */
+    private void openDoor(LevelRuntime level) {
+        int[] door = level.getLayout().getDoorCell();
+        if(door == null) return;
+        this.openSingleDoor(level, level.getLayout().worldX(door[0]) + 1, level.getLayout().worldZ(door[1]) + 1);
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/generator/BackroomsChunkGenerator.java

@@ -0,0 +1,335 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.generator;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelLayout;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelLayout.Cell;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelPalette;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.TransitionType;
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+import net.minestom.server.instance.generator.Generator;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Random;
+import java.util.Set;
+
+/**
+ * Rendert die vorab berechneten Level-Layouts als vertikal gestapelte Ebenen.
+ * Reines Lookup: saemtliche Struktur (Maze, Exits, Kisten, Licht) steht im LevelLayout.
+ *
+ * Aufbau je Level (baseY b): b Bedrock, b+1 Boden, b+2..b+1+roomHeight Raum,
+ * b+2+roomHeight Decke, b+3+roomHeight Bedrock. Exit-Schaechte (HOLE/LADDER) durchbrechen
+ * Boden und die Decke des Levels darunter.
+ */
+public class BackroomsChunkGenerator implements Generator {
+    private final List<LevelRuntime> levels;
+    /** O(1)-Lookups pro Level (statt Listen-Scans pro Blocksaeule) */
+    private final List<Set<Long>> lightKeys = new ArrayList<>();
+    private final List<Set<Long>> chestKeys = new ArrayList<>();
+
+    /** wiederverwendetes Random pro Generator-Thread (Seed pro Saeule gesetzt) */
+    private static final ThreadLocal<Random> COLUMN_RANDOM = ThreadLocal.withInitial(Random::new);
+
+    public BackroomsChunkGenerator(List<LevelRuntime> levels) {
+        this.levels = levels;
+        for(LevelRuntime level : levels) {
+            Set<Long> lights = new HashSet<>();
+            level.getLayout().getLightCells().forEach(cell -> lights.add(cellKey(cell[0], cell[1])));
+            this.lightKeys.add(lights);
+
+            Set<Long> chests = new HashSet<>();
+            level.getLayout().getChestCells().forEach(cell -> chests.add(cellKey(cell[0], cell[1])));
+            int[] keyChest = level.getLayout().getKeyChestCell();
+            if(keyChest != null) chests.add(cellKey(keyChest[0], keyChest[1]));
+            this.chestKeys.add(chests);
+        }
+    }
+
+    private static long cellKey(int cx, int cz) {
+        return ((long) cx << 32) | (cz & 0xFFFFFFFFL);
+    }
+
+    @Override
+    public void generate(@NotNull GenerationUnit unit) {
+        Point start = unit.absoluteStart();
+
+        // Massive Zwischenschichten als ein fillHeight pro Level statt ~17 setBlock
+        // pro Saeule; Schacht-Saeulen werden in generateColumn wieder freigeraeumt
+        for(int levelIndex = 1; levelIndex < this.levels.size(); levelIndex++) {
+            LevelRuntime level = this.levels.get(levelIndex);
+            int bandStart = level.getBaseY() + 2 + level.getDefinition().palette().roomHeight() + 2;
+            unit.modifier().fillHeight(bandStart, level.getBaseY() + LevelRuntime.LEVEL_HEIGHT, Block.BEDROCK);
+        }
+
+        for(int x = 0; x < unit.size().blockX(); x++) {
+            for(int z = 0; z < unit.size().blockZ(); z++) {
+                int worldX = start.blockX() + x;
+                int worldZ = start.blockZ() + z;
+
+                for(int levelIndex = 0; levelIndex < this.levels.size(); levelIndex++) {
+                    this.generateColumn(unit, this.levels.get(levelIndex), levelIndex, worldX, worldZ);
+                }
+            }
+        }
+    }
+
+    private void generateColumn(GenerationUnit unit, LevelRuntime level, int levelIndex, int worldX, int worldZ) {
+        LevelLayout layout = level.getLayout();
+        int cx = layout.cellX(worldX);
+        int cz = layout.cellZ(worldZ);
+        if(!layout.inBounds(cx, cz) || !layout.inGenerationBounds(cx, cz)) return;
+
+        LevelPalette palette = level.getDefinition().palette();
+        int baseY = level.getBaseY();
+        int ceilingY = baseY + 2 + palette.roomHeight();
+        Cell cell = layout.cellAt(cx, cz);
+        TransitionType transition = level.getDefinition().transitionType();
+
+        // deterministische Variation pro Saeule (fleckige Boeden/Waende)
+        Random rnd = COLUMN_RANDOM.get();
+        rnd.setSeed(worldX * 341873128712L + worldZ * 132897987541L + levelIndex);
+
+        boolean openShaft = cell == Cell.EXIT && (transition == TransitionType.HOLE || transition == TransitionType.LADDER);
+
+        // Boden + Fundament
+        if(openShaft) {
+            // Schacht: kein Boden, Loch faellt bis ins Level darunter
+        } else if(cell == Cell.WATER) {
+            this.set(unit, worldX, baseY, worldZ, Block.BEDROCK);
+            this.set(unit, worldX, baseY + 1, worldZ, Block.WATER);
+        } else if(cell == Cell.DEEP_WATER) {
+            // doppelt tiefes Becken: zwei Wasserschichten
+            this.set(unit, worldX, baseY, worldZ, Block.BEDROCK);
+            this.set(unit, worldX, baseY + 1, worldZ, Block.WATER);
+            this.set(unit, worldX, baseY + 2, worldZ, Block.WATER);
+        } else if(cell == Cell.LEAK) {
+            // Undichtigkeit: Bodenpfuetze, Wassersaeule in der Zellenmitte bis zur Leitung
+            this.set(unit, worldX, baseY, worldZ, Block.BEDROCK);
+            this.set(unit, worldX, baseY + 1, worldZ, Block.WATER);
+        } else if(cell == Cell.EXIT && transition == TransitionType.GLITCH_FLOOR) {
+            this.set(unit, worldX, baseY, worldZ, Block.BEDROCK);
+            this.set(unit, worldX, baseY + 1, worldZ, (worldX + worldZ) % 2 == 0 ? Block.BLACK_CONCRETE : Block.PURPLE_CONCRETE);
+        } else if(this.isEscapeGoal(layout, cx, transition)) {
+            // Sichtbare Ziel-Zone am Ende des Finale-Korridors: leuchtender Boden
+            this.set(unit, worldX, baseY, worldZ, Block.BEDROCK);
+            this.set(unit, worldX, baseY + 1, worldZ, Block.GLOWSTONE);
+        } else {
+            this.set(unit, worldX, baseY, worldZ, Block.BEDROCK);
+            Block floor = this.isDoorStain(layout, cx, cz, rnd)
+                ? this.stainBlock(rnd)
+                : palette.floorAt(worldX, worldZ, rnd);
+            this.set(unit, worldX, baseY + 1, worldZ, floor);
+        }
+
+        // Loot-Kisten (Barrels) in der Zellenmitte
+        boolean isChestColumn = !openShaft && this.isCenterColumn(worldX, worldZ) && this.isChestCell(levelIndex, cx, cz);
+        if(isChestColumn) {
+            this.set(unit, worldX, baseY + 2, worldZ, Block.BARREL);
+        }
+
+        // Deko: seltene Boden-Details (Spinnweben, Kuchen, Sculk ...) und Decken-Details (Ketten, Lampen)
+        if(cell == Cell.FLOOR && !isChestColumn) {
+            if(!palette.floorDeco().isEmpty() && rnd.nextDouble() < palette.floorDecoChance()) {
+                this.set(unit, worldX, baseY + 2, worldZ, palette.rndFloorDeco(rnd));
+            }
+            if(!palette.ceilingDeco().isEmpty() && rnd.nextDouble() < palette.ceilingDecoChance()) {
+                this.set(unit, worldX, ceilingY - 1, worldZ, palette.rndCeilingDeco(rnd));
+            }
+        }
+
+        // Raumvolumen
+        if(cell == Cell.WALL) {
+            // Sockelleiste unten, darueber die Wandvarianten — gibt jedem Level eine eigene Linie
+            boolean stained = this.isDoorStain(layout, cx, cz, rnd);
+            this.set(unit, worldX, baseY + 2, worldZ, stained ? this.stainBlock(rnd) : palette.wallBase());
+            Block wall = palette.rndWall(rnd);
+            for(int y = baseY + 3; y < ceilingY; y++) {
+                this.set(unit, worldX, y, worldZ, stained && rnd.nextInt(3) > 0 ? this.stainBlock(rnd) : wall);
+            }
+        } else if(cell == Cell.PILLAR) {
+            for(int y = baseY + 2; y < ceilingY; y++) {
+                this.set(unit, worldX, y, worldZ, palette.pillar());
+            }
+        } else if(cell == Cell.DOOR) {
+            // Tuerwand mit begehbarem Durchgang: entlang der Laufrichtung wird eine
+            // 1 Block breite Schneise durch die Zellentiefe gecarvt, mittig sitzt die Eisentuer
+            String facing = this.doorFacing(layout, cx, cz);
+            boolean passageAlongX = facing.equals("east") || facing.equals("west");
+            int localX = Math.floorMod(worldX, LevelLayout.CELL_SIZE);
+            int localZ = Math.floorMod(worldZ, LevelLayout.CELL_SIZE);
+            boolean onPassage = passageAlongX ? localZ == 1 : localX == 1;
+            boolean isCenter = localX == 1 && localZ == 1;
+
+            if(isCenter) {
+                this.set(unit, worldX, baseY + 2, worldZ, Block.IRON_DOOR.withProperties(Map.of("half", "lower", "facing", facing)));
+                this.set(unit, worldX, baseY + 3, worldZ, Block.IRON_DOOR.withProperties(Map.of("half", "upper", "facing", facing)));
+                for(int y = baseY + 4; y < ceilingY; y++) {
+                    this.set(unit, worldX, y, worldZ, palette.rndWall(rnd));
+                }
+            } else if(onPassage) {
+                // Durchgang: unten frei, Tuersturz darueber
+                for(int y = baseY + 4; y < ceilingY; y++) {
+                    this.set(unit, worldX, y, worldZ, palette.rndWall(rnd));
+                }
+            } else {
+                this.set(unit, worldX, baseY + 2, worldZ, palette.wallBase());
+                Block wall = palette.rndWall(rnd);
+                for(int y = baseY + 3; y < ceilingY; y++) {
+                    this.set(unit, worldX, y, worldZ, wall);
+                }
+            }
+        } else if(cell == Cell.THIN_WALL_X || cell == Cell.THIN_WALL_Z || cell == Cell.THIN_PILLAR) {
+            // Prototyp-Optik: 1 Block duenne Wandebene bzw. Eckpfosten in der Zellenmitte;
+            // der Pfosten schlaegt Wand-Arme zu angrenzenden Segmenten, damit an den
+            // Rasterpunkten keine Ein-Block-Luecken bleiben
+            int localX = Math.floorMod(worldX, LevelLayout.CELL_SIZE);
+            int localZ = Math.floorMod(worldZ, LevelLayout.CELL_SIZE);
+            boolean isCenter = localX == 1 && localZ == 1;
+            boolean solid = switch(cell) {
+                case THIN_WALL_X -> localZ == 1;
+                case THIN_WALL_Z -> localX == 1;
+                default -> isCenter
+                    || localZ == 1 && localX == 0 && this.joinsThinWallX(layout, cx - 1, cz)
+                    || localZ == 1 && localX == 2 && this.joinsThinWallX(layout, cx + 1, cz)
+                    || localX == 1 && localZ == 0 && this.joinsThinWallZ(layout, cx, cz - 1)
+                    || localX == 1 && localZ == 2 && this.joinsThinWallZ(layout, cx, cz + 1);
+            };
+            if(solid) {
+                Block block = cell == Cell.THIN_PILLAR && isCenter ? palette.pillar() : palette.rndWall(rnd);
+                for(int y = baseY + 2; y < ceilingY; y++) {
+                    this.set(unit, worldX, y, worldZ, block);
+                }
+            }
+        } else if(cell == Cell.PIPE || cell == Cell.LEAK) {
+            // Kupfer-Leitung unter der Decke; beim Leck laeuft eine Wassersaeule herab
+            Block duct = rnd.nextInt(3) == 0 ? Block.EXPOSED_COPPER : Block.WAXED_COPPER_BLOCK;
+            this.set(unit, worldX, ceilingY - 1, worldZ, duct);
+            if(cell == Cell.LEAK && this.isCenterColumn(worldX, worldZ)) {
+                for(int y = baseY + 2; y < ceilingY - 1; y++) {
+                    this.set(unit, worldX, y, worldZ, Block.WATER);
+                }
+            }
+        } else if(cell == Cell.EXIT && transition == TransitionType.LADDER) {
+            // Leiter an der westlichen Schachtwand
+            if(Math.floorMod(worldX, LevelLayout.CELL_SIZE) == 0) {
+                for(int y = baseY - LevelRuntime.LEVEL_HEIGHT + 2; y < ceilingY; y++) {
+                    this.set(unit, worldX, y, worldZ, Block.LADDER.withProperty("facing", "east"));
+                }
+            }
+        }
+
+        // Decke + Abschluss; Exit-Schaechte des Levels darueber durchbrechen beides —
+        // dort muss auch die per fillHeight gesetzte Zwischenschicht wieder aufgehen
+        if(this.shaftFromAbove(levelIndex, worldX, worldZ)) {
+            // Roehre freiraeumen — bei Leiter-Schaechten bleibt die Leiter an der Westwand erhalten
+            LevelRuntime above = this.levels.get(levelIndex - 1);
+            boolean ladderColumn = above.getDefinition().transitionType() == TransitionType.LADDER
+                && Math.floorMod(worldX, LevelLayout.CELL_SIZE) == 0;
+            Block fill = ladderColumn ? Block.LADDER.withProperty("facing", "east") : Block.AIR;
+            for(int y = ceilingY; y < baseY + LevelRuntime.LEVEL_HEIGHT; y++) {
+                this.set(unit, worldX, y, worldZ, fill);
+            }
+            return;
+        }
+
+        boolean isLight = this.isLightColumn(levelIndex, cx, cz, worldX, worldZ)
+            || this.isEscapeGoal(layout, cx, transition);
+        this.set(unit, worldX, ceilingY, worldZ, isLight ? palette.light() : palette.rndCeiling(rnd));
+        this.set(unit, worldX, ceilingY + 1, worldZ, Block.BEDROCK);
+    }
+
+    /** Grenzt an dieser Nachbarzelle ein Wandsegment entlang X (oder eine massive Wand) an? */
+    private boolean joinsThinWallX(LevelLayout layout, int cx, int cz) {
+        Cell neighbour = layout.cellAt(cx, cz);
+        return neighbour == Cell.THIN_WALL_X || neighbour == Cell.WALL;
+    }
+
+    /** Grenzt an dieser Nachbarzelle ein Wandsegment entlang Z (oder eine massive Wand) an? */
+    private boolean joinsThinWallZ(LevelLayout layout, int cx, int cz) {
+        Cell neighbour = layout.cellAt(cx, cz);
+        return neighbour == Cell.THIN_WALL_Z || neighbour == Cell.WALL;
+    }
+
+    /**
+     * "Ruined-Portal-Fleck" um die Schluesseltuer: Korruption breitet sich mit
+     * abnehmender Dichte ueber Boden und Waende aus und macht die Tuer weithin sichtbar.
+     */
+    private boolean isDoorStain(LevelLayout layout, int cx, int cz, Random rnd) {
+        int[] door = layout.getDoorCell();
+        if(door == null) return false;
+        int distance = Math.max(Math.abs(cx - door[0]), Math.abs(cz - door[1]));
+        if(distance > 3) return false;
+        double chance = switch(distance) {
+            case 0, 1 -> 0.85;
+            case 2 -> 0.45;
+            default -> 0.15;
+        };
+        return rnd.nextDouble() < chance;
+    }
+
+    private Block stainBlock(Random rnd) {
+        int roll = rnd.nextInt(10);
+        if(roll == 0) return Block.CRYING_OBSIDIAN;
+        if(roll == 1) return Block.GILDED_BLACKSTONE;
+        if(roll <= 4) return Block.OBSIDIAN;
+        return Block.BLACKSTONE;
+    }
+
+    /** Ziel-Band des Finales: alle begehbaren Zellen ab der Exit-Zelle leuchten */
+    private boolean isEscapeGoal(LevelLayout layout, int cx, TransitionType transition) {
+        if(transition != TransitionType.ESCAPE) return false;
+        int[] exit = layout.getExitCell();
+        return exit != null && cx >= exit[0];
+    }
+
+    /**
+     * Blickrichtung der Tuer: vom Exit weg (Exit-Kammer) bzw. zur begehbaren
+     * Seite hin (Seitentueren im Finale-Korridor).
+     */
+    private String doorFacing(LevelLayout layout, int cx, int cz) {
+        if(layout.cellAt(cx - 1, cz) == Cell.EXIT) return "east";
+        if(layout.cellAt(cx + 1, cz) == Cell.EXIT) return "west";
+        if(layout.cellAt(cx, cz - 1) == Cell.EXIT) return "south";
+        if(layout.cellAt(cx, cz + 1) == Cell.EXIT) return "north";
+        if(layout.isWalkable(cx, cz - 1) || layout.isWalkable(cx, cz + 1)) return "north";
+        return "east";
+    }
+
+    /** Lichtblock in der Deckenmitte jeder Lichtzelle */
+    private boolean isLightColumn(int levelIndex, int cx, int cz, int worldX, int worldZ) {
+        if(!this.isCenterColumn(worldX, worldZ)) return false;
+        return this.lightKeys.get(levelIndex).contains(cellKey(cx, cz));
+    }
+
+    private boolean isCenterColumn(int worldX, int worldZ) {
+        int centerOffset = LevelLayout.CELL_SIZE / 2;
+        return Math.floorMod(worldX - centerOffset, LevelLayout.CELL_SIZE) == 0
+            && Math.floorMod(worldZ - centerOffset, LevelLayout.CELL_SIZE) == 0;
+    }
+
+    private boolean isChestCell(int levelIndex, int cx, int cz) {
+        return this.chestKeys.get(levelIndex).contains(cellKey(cx, cz));
+    }
+
+    /** Faellt an dieser Saeule ein HOLE/LADDER-Schacht aus dem Level darueber herein? */
+    private boolean shaftFromAbove(int levelIndex, int worldX, int worldZ) {
+        if(levelIndex == 0) return false;
+        LevelRuntime above = this.levels.get(levelIndex - 1);
+        TransitionType transition = above.getDefinition().transitionType();
+        if(transition != TransitionType.HOLE && transition != TransitionType.LADDER) return false;
+
+        LevelLayout aboveLayout = above.getLayout();
+        int[] exit = aboveLayout.getExitCell();
+        if(exit == null) return false;
+        return aboveLayout.cellX(worldX) == exit[0] && aboveLayout.cellZ(worldZ) == exit[1];
+    }
+
+    private void set(GenerationUnit unit, int x, int y, int z, Block block) {
+        unit.modifier().setBlock(x, y, z, block);
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/generator/MazeAlgorithms.java

@@ -0,0 +1,300 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.generator;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelLayout;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelLayout.Cell;
+
+import java.util.ArrayDeque;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.Deque;
+import java.util.List;
+import java.util.Random;
+
+/**
+ * Layout-Bausteine: Labyrinth (Recursive Backtracker), Braiding (Sackgassen oeffnen),
+ * Raum-Carving und BFS-Distanzkarten. Arbeitet rein auf dem Zellenraster — servertauglich
+ * und unit-testbar ohne Minestom.
+ */
+public final class MazeAlgorithms {
+    private static final int[][] DIRECTIONS = {{1, 0}, {-1, 0}, {0, 1}, {0, -1}};
+
+    private MazeAlgorithms() {
+    }
+
+    /**
+     * Carvt ein perfektes Labyrinth in das (komplett mit WALL gefuellte) Layout.
+     * Maze-Knoten liegen auf ungeraden Zellkoordinaten; der Rand (Zelle 0 und cells-1) bleibt Wand.
+     */
+    public static void backtracker(LevelLayout layout, Random rnd) {
+        int cells = layout.getCells();
+        boolean[][] visited = new boolean[cells][cells];
+        Deque<int[]> stack = new ArrayDeque<>();
+
+        int[] start = {1, 1};
+        visited[start[0]][start[1]] = true;
+        layout.setCell(start[0], start[1], Cell.FLOOR);
+        stack.push(start);
+
+        while(!stack.isEmpty()) {
+            int[] current = stack.peek();
+            List<int[]> candidates = new ArrayList<>();
+            for(int[] dir : DIRECTIONS) {
+                int nx = current[0] + dir[0] * 2;
+                int nz = current[1] + dir[1] * 2;
+                if(nx <= 0 || nz <= 0 || nx >= cells - 1 || nz >= cells - 1) continue;
+                if(!visited[nx][nz]) candidates.add(new int[]{nx, nz, dir[0], dir[1]});
+            }
+
+            if(candidates.isEmpty()) {
+                stack.pop();
+                continue;
+            }
+
+            int[] next = candidates.get(rnd.nextInt(candidates.size()));
+            visited[next[0]][next[1]] = true;
+            layout.setCell(current[0] + next[2], current[1] + next[3], Cell.FLOOR);
+            layout.setCell(next[0], next[1], Cell.FLOOR);
+            stack.push(new int[]{next[0], next[1]});
+        }
+    }
+
+    /**
+     * Oeffnet den angegebenen Anteil aller Sackgassen, indem eine zufaellige
+     * angrenzende Wand zu FLOOR wird — macht das Labyrinth schleifenreich.
+     */
+    public static void braid(LevelLayout layout, Random rnd, double ratio) {
+        int cells = layout.getCells();
+        List<int[]> deadEnds = new ArrayList<>();
+        for(int x = 1; x < cells - 1; x++) {
+            for(int z = 1; z < cells - 1; z++) {
+                if(!layout.isWalkable(x, z)) continue;
+                int open = 0;
+                for(int[] dir : DIRECTIONS) {
+                    if(layout.isWalkable(x + dir[0], z + dir[1])) open++;
+                }
+                if(open == 1) deadEnds.add(new int[]{x, z});
+            }
+        }
+
+        Collections.shuffle(deadEnds, rnd);
+        int toOpen = (int) Math.round(deadEnds.size() * ratio);
+        for(int i = 0; i < toOpen; i++) {
+            int[] deadEnd = deadEnds.get(i);
+            List<int[]> walls = new ArrayList<>();
+            for(int[] dir : DIRECTIONS) {
+                int wx = deadEnd[0] + dir[0];
+                int wz = deadEnd[1] + dir[1];
+                int behindX = deadEnd[0] + dir[0] * 2;
+                int behindZ = deadEnd[1] + dir[1] * 2;
+                if(wx <= 0 || wz <= 0 || wx >= cells - 1 || wz >= cells - 1) continue;
+                if(layout.cellAt(wx, wz) == Cell.WALL && layout.isWalkable(behindX, behindZ)) {
+                    walls.add(new int[]{wx, wz});
+                }
+            }
+            if(!walls.isEmpty()) {
+                int[] wall = walls.get(rnd.nextInt(walls.size()));
+                layout.setCell(wall[0], wall[1], Cell.FLOOR);
+            }
+        }
+    }
+
+    /**
+     * Raeumt zufaellige Rechtecke frei (Raeume). Entfernt nur Waende, die Konnektivitaet
+     * des Labyrinths bleibt daher erhalten.
+     */
+    public static void carveRooms(LevelLayout layout, Random rnd, int roomCount, int minSize, int maxSize) {
+        int cells = layout.getCells();
+        for(int i = 0; i < roomCount; i++) {
+            int width = minSize + rnd.nextInt(maxSize - minSize + 1);
+            int depth = minSize + rnd.nextInt(maxSize - minSize + 1);
+            int startX = 1 + rnd.nextInt(Math.max(1, cells - width - 2));
+            int startZ = 1 + rnd.nextInt(Math.max(1, cells - depth - 2));
+            for(int x = startX; x < startX + width; x++) {
+                for(int z = startZ; z < startZ + depth; z++) {
+                    if(x >= cells - 1 || z >= cells - 1) continue;
+                    if(layout.cellAt(x, z) == Cell.WALL) layout.setCell(x, z, Cell.FLOOR);
+                }
+            }
+        }
+    }
+
+    /**
+     * BFS-Distanzen (in Zellen) von einer Startzelle aus; -1 = unerreichbar.
+     */
+    public static int[][] bfsDistances(LevelLayout layout, int[] start) {
+        int cells = layout.getCells();
+        int[][] distances = new int[cells][cells];
+        for(int[] row : distances) Arrays.fill(row, -1);
+
+        Deque<int[]> queue = new ArrayDeque<>();
+        distances[start[0]][start[1]] = 0;
+        queue.add(start);
+        while(!queue.isEmpty()) {
+            int[] current = queue.poll();
+            for(int[] dir : DIRECTIONS) {
+                int nx = current[0] + dir[0];
+                int nz = current[1] + dir[1];
+                if(!layout.inBounds(nx, nz) || !layout.isWalkable(nx, nz)) continue;
+                if(distances[nx][nz] != -1) continue;
+                distances[nx][nz] = distances[current[0]][current[1]] + 1;
+                queue.add(new int[]{nx, nz});
+            }
+        }
+        return distances;
+    }
+
+    /**
+     * Alle begehbaren Zellen, deren BFS-Distanz im Perzentil-Fenster [minPercentile, maxPercentile]
+     * der maximalen Distanz liegt.
+     */
+    public static List<int[]> cellsInDistancePercentile(LevelLayout layout, int[][] distances, double minPercentile, double maxPercentile) {
+        int max = 0;
+        for(int[] row : distances) {
+            for(int distance : row) max = Math.max(max, distance);
+        }
+
+        List<int[]> result = new ArrayList<>();
+        for(int x = 0; x < layout.getCells(); x++) {
+            for(int z = 0; z < layout.getCells(); z++) {
+                int distance = distances[x][z];
+                if(distance < 0) continue;
+                double percentile = max == 0 ? 0 : (double) distance / max;
+                if(percentile >= minPercentile && percentile <= maxPercentile) result.add(new int[]{x, z});
+            }
+        }
+        return result;
+    }
+
+    /**
+     * Offene Halle: alle Innenzellen werden begehbar, nur der Rand bleibt Wand.
+     * Grundlage fuer Level mit "grosser Raum statt Gaenge"-Charakter (Parkhaus, Poolrooms).
+     */
+    public static void openField(LevelLayout layout) {
+        int cells = layout.getCells();
+        for(int x = 1; x < cells - 1; x++) {
+            for(int z = 1; z < cells - 1; z++) {
+                layout.setCell(x, z, Cell.FLOOR);
+            }
+        }
+    }
+
+    /**
+     * Verstreut gerade Wandzuege (mit gelegentlichen Luecken und L-Knicken) in einer
+     * offenen Flaeche — ergibt Sichtblocker und Raumgefuehl statt Korridore.
+     */
+    public static void scatterWallRuns(LevelLayout layout, Random rnd, int runCount, int minLength, int maxLength) {
+        int cells = layout.getCells();
+        for(int i = 0; i < runCount; i++) {
+            int x = 2 + rnd.nextInt(cells - 4);
+            int z = 2 + rnd.nextInt(cells - 4);
+            int[] dir = DIRECTIONS[rnd.nextInt(DIRECTIONS.length)];
+            int length = minLength + rnd.nextInt(Math.max(1, maxLength - minLength + 1));
+
+            for(int step = 0; step < length; step++) {
+                if(x <= 1 || z <= 1 || x >= cells - 2 || z >= cells - 2) break;
+                // gelegentliche Luecke, damit keine Sackgassen-Kaefige entstehen
+                if(rnd.nextInt(8) != 0) layout.setCell(x, z, Cell.WALL);
+                // seltener L-Knick
+                if(rnd.nextInt(6) == 0) dir = DIRECTIONS[rnd.nextInt(DIRECTIONS.length)];
+                x += dir[0];
+                z += dir[1];
+            }
+        }
+    }
+
+    /**
+     * Verbindet eine (moeglicherweise eingemauerte) Zelle mit der Hauptkomponente:
+     * BFS durch Waende bis zur ersten Zelle mit rootDistances >= 0, Pfad wird gecarvt.
+     */
+    public static void connectToComponent(LevelLayout layout, int[][] rootDistances, int[] start) {
+        int cells = layout.getCells();
+        Deque<int[]> queue = new ArrayDeque<>();
+        java.util.Map<Long, int[]> cameFrom = new java.util.HashMap<>();
+        queue.add(start);
+        cameFrom.put(key(start[0], start[1]), null);
+
+        while(!queue.isEmpty()) {
+            int[] current = queue.poll();
+            for(int[] dir : DIRECTIONS) {
+                int nx = current[0] + dir[0];
+                int nz = current[1] + dir[1];
+                if(nx <= 0 || nz <= 0 || nx >= cells - 1 || nz >= cells - 1) continue;
+                // Exit-Kammern sind tabu: weder durch die Tuer noch durch die Kammermauern carven
+                if(isChamberProtected(layout, nx, nz)) continue;
+                long cellKey = key(nx, nz);
+                if(cameFrom.containsKey(cellKey)) continue;
+                cameFrom.put(cellKey, current);
+
+                if(rootDistances[nx][nz] >= 0) {
+                    // Pfad zurueckverfolgen und freiraeumen
+                    int[] step = current;
+                    while(step != null) {
+                        if(!layout.isWalkable(step[0], step[1])) layout.setCell(step[0], step[1], Cell.FLOOR);
+                        step = cameFrom.get(key(step[0], step[1]));
+                    }
+                    return;
+                }
+                queue.add(new int[]{nx, nz});
+            }
+        }
+    }
+
+    /**
+     * Stellt sicher, dass alle wichtigen Zellen von root aus erreichbar sind;
+     * abgetrennte Zellen werden per Wanddurchbruch angebunden.
+     */
+    public static void ensureConnected(LevelLayout layout, int[] root, List<int[]> important) {
+        int[][] distances = bfsDistances(layout, root);
+        for(int[] cell : important) {
+            if(!layout.inBounds(cell[0], cell[1])) continue;
+            if(distances[cell[0]][cell[1]] >= 0) continue;
+            connectToComponent(layout, distances, cell);
+            distances = bfsDistances(layout, root);
+        }
+    }
+
+    private static long key(int x, int z) {
+        return ((long) x << 32) | (z & 0xFFFFFFFFL);
+    }
+
+    /** Zelle gehoert zur verschlossenen Exit-Kammer (Tuer, Exit oder Kammermauer-Ring). */
+    public static boolean isChamberProtected(LevelLayout layout, int cx, int cz) {
+        LevelLayout.Cell cell = layout.cellAt(cx, cz);
+        if(cell == LevelLayout.Cell.DOOR || cell == LevelLayout.Cell.EXIT) return true;
+        for(int dx = -1; dx <= 1; dx++) {
+            for(int dz = -1; dz <= 1; dz++) {
+                if(layout.cellAt(cx + dx, cz + dz) == LevelLayout.Cell.EXIT) return true;
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Rejection-Sampling: bis zu count Zellen aus candidates mit paarweisem Mindestabstand.
+     * Faellt der Abstand nicht mehr erfuellbar aus, wird er schrittweise verringert.
+     */
+    public static List<int[]> sampleSpread(List<int[]> candidates, Random rnd, int count, double minDistance) {
+        List<int[]> pool = new ArrayList<>(candidates);
+        Collections.shuffle(pool, rnd);
+        List<int[]> chosen = new ArrayList<>();
+        double distance = minDistance;
+        while(chosen.size() < count && distance >= 0) {
+            for(int[] candidate : pool) {
+                if(chosen.size() >= count) break;
+                boolean fits = true;
+                for(int[] existing : chosen) {
+                    double dx = candidate[0] - existing[0];
+                    double dz = candidate[1] - existing[1];
+                    if(Math.sqrt(dx * dx + dz * dz) < distance) {
+                        fits = false;
+                        break;
+                    }
+                }
+                if(fits) chosen.add(candidate);
+            }
+            distance -= 1;
+        }
+        return chosen;
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/item/BackroomsItems.java

@@ -0,0 +1,106 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.item;
+
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.format.NamedTextColor;
+import net.kyori.adventure.text.format.TextDecoration;
+import net.minestom.server.component.DataComponents;
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.item.ItemStack;
+import net.minestom.server.item.Material;
+import net.minestom.server.entity.Player;
+import net.minestom.server.item.component.LodestoneTracker;
+import net.minestom.server.tag.Tag;
+
+import java.util.function.Predicate;
+
+/**
+ * ItemStack-Fabriken und Tag-basierte Erkennung aller Backrooms-Items.
+ */
+public final class BackroomsItems {
+    public static final Tag<String> ITEM_TAG = Tag.String("backroomsItem");
+    public static final Tag<Integer> KEY_LEVEL_TAG = Tag.Integer("backroomsKeyLevel");
+
+    public static final String ALMOND_WATER = "almond_water";
+    public static final String ENERGY_BAR = "energy_bar";
+    public static final String LEVEL_KEY = "level_key";
+    public static final String DOOR_COMPASS = "door_compass";
+
+    private BackroomsItems() {
+    }
+
+    /** Stellt Sanity wieder her und heilt leicht — das Kern-Loot der Backrooms. */
+    public static ItemStack almondWater() {
+        return ItemStack.builder(Material.POTION)
+            .customName(Component.text("Almond Water", NamedTextColor.AQUA).decoration(TextDecoration.ITALIC, false))
+            .set(ITEM_TAG, ALMOND_WATER)
+            .build();
+    }
+
+    /** Kurzer Geschwindigkeits-Schub (auch als Strecken-Pickup im Finale). */
+    public static ItemStack energyBar() {
+        return ItemStack.builder(Material.GOLDEN_CARROT)
+            .customName(Component.text("Energy Bar", NamedTextColor.GOLD).decoration(TextDecoration.ITALIC, false))
+            .set(ITEM_TAG, ENERGY_BAR)
+            .build();
+    }
+
+    /** Schluessel fuer die verschlossene Exit-Kammer des angegebenen Levels. */
+    public static ItemStack levelKey(int levelIndex) {
+        return ItemStack.builder(Material.TRIPWIRE_HOOK)
+            .customName(Component.text("Level Key", NamedTextColor.YELLOW).decoration(TextDecoration.ITALIC, false))
+            .set(ITEM_TAG, LEVEL_KEY)
+            .set(KEY_LEVEL_TAG, levelIndex)
+            .build();
+    }
+
+    /** Kompass, der zur verschlossenen Tuer des Levels zeigt. */
+    public static ItemStack doorCompass(int levelIndex, String dimension, Point doorPosition) {
+        return ItemStack.builder(Material.COMPASS)
+            .customName(Component.text("Door Compass", NamedTextColor.YELLOW).decoration(TextDecoration.ITALIC, false))
+            .set(DataComponents.LODESTONE_TRACKER, new LodestoneTracker(dimension, doorPosition, false))
+            .set(ITEM_TAG, DOOR_COMPASS)
+            .set(KEY_LEVEL_TAG, levelIndex)
+            .build();
+    }
+
+    /** Entfernt alle Items, auf die das Praedikat passt, aus dem Spieler-Inventar. */
+    public static void removeMatching(Player player, Predicate<ItemStack> filter) {
+        var inventory = player.getInventory();
+        for(int slot = 0; slot < inventory.getSize(); slot++) {
+            if(filter.test(inventory.getItemStack(slot))) inventory.setItemStack(slot, ItemStack.AIR);
+        }
+    }
+
+    public static boolean hasMatching(Player player, Predicate<ItemStack> filter) {
+        var inventory = player.getInventory();
+        for(int slot = 0; slot < inventory.getSize(); slot++) {
+            if(filter.test(inventory.getItemStack(slot))) return true;
+        }
+        return false;
+    }
+
+    public static int count(Player player, String itemId) {
+        int count = 0;
+        var inventory = player.getInventory();
+        for(int slot = 0; slot < inventory.getSize(); slot++) {
+            ItemStack item = inventory.getItemStack(slot);
+            if(is(item, itemId)) count += item.amount();
+        }
+        return count;
+    }
+
+    public static boolean is(ItemStack item, String id) {
+        return id.equals(item.getTag(ITEM_TAG));
+    }
+
+    /** Key oder Tuerkompass fuer das angegebene Level (beides verfaellt beim Tueroeffnen). */
+    public static boolean isDoorItemFor(ItemStack item, int levelIndex) {
+        String id = item.getTag(ITEM_TAG);
+        if(!LEVEL_KEY.equals(id) && !DOOR_COMPASS.equals(id)) return false;
+        return Integer.valueOf(levelIndex).equals(item.getTag(KEY_LEVEL_TAG));
+    }
+
+    public static boolean isKeyFor(ItemStack item, int levelIndex) {
+        return is(item, LEVEL_KEY) && Integer.valueOf(levelIndex).equals(item.getTag(KEY_LEVEL_TAG));
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/level/LevelDefinition.java

@@ -0,0 +1,229 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.BackroomsGame;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.ambience.AmbienceProfile;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.generator.MazeAlgorithms;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.BackroomsMonster;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+
+/**
+ * Bauplan eines Leveltyps: Layout-Erzeugung, Blockpalette, Uebergang, Ambience und
+ * Monster-Besatz. Pro Spiel wird je Level eine frische Instanz erzeugt — Level-Events
+ * (Blackouts, Lichtausfaelle, Duelle) duerfen daher eigenen Zustand halten.
+ */
+public abstract class LevelDefinition {
+
+    public abstract LevelType type();
+
+    public abstract LevelLayout buildLayout(Random rnd, int cells, int playerCount);
+
+    public abstract LevelPalette palette();
+
+    public abstract TransitionType transitionType();
+
+    public abstract AmbienceProfile ambience();
+
+    /** Initiale Monster-Population; density 1-3 aus der Spielkonfiguration. */
+    public void populateMonsters(BackroomsGame game, LevelRuntime runtime, int density) {
+    }
+
+    /** Wird ~1x pro Sekunde aufgerufen, solange Spieler im Level sind (Events wie Blackouts). */
+    public void onLevelTick(BackroomsGame game, LevelRuntime runtime) {
+    }
+
+    /**
+     * Dynamischer Nachschub des Monster-Directors: liefert ein Monster fuer die gegebene
+     * Zelle in Spielernaehe — oder null, wenn dort (oder in diesem Level) nichts spawnen soll.
+     * Das Monster wird vom Director gespawnt und registriert.
+     */
+    public BackroomsMonster createRoamingMonster(LevelRuntime runtime, int[] cell) {
+        return null;
+    }
+
+    /** Exit-Kammer verschlossen, Schluessel in einer Kiste versteckt? */
+    public boolean usesKeyDoor() {
+        return false;
+    }
+
+    /**
+     * true: jeder Key oeffnet nur die angeklickte Tuer und wird verbraucht (Finale-Seitentueren);
+     * false: ein Key oeffnet die Exit-Kammer fuer alle, danach zerfallen alle Keys.
+     */
+    public boolean opensSingleDoors() {
+        return false;
+    }
+
+    /** Permanente Dunkelheit (Lights Out): DARKNESS-Effekt unabhaengig von darkZones. */
+    public boolean permanentDarkness() {
+        return false;
+    }
+
+    /**
+     * Standard-Bauweise fuer Maze-Level: Backtracker, Braiding, Raeume, dann garantierte
+     * Platzierung von Spawns (verteilt), Exit (fern der Spawns, optional mit verschlossener
+     * Kammer + Schluessel), Kisten und Lichtzellen.
+     */
+    protected LevelLayout standardLayout(
+        Random rnd,
+        int cells,
+        int playerCount,
+        double braidRatio,
+        int roomCount,
+        int maxRoomSize,
+        double chestsPerHundredCells
+    ) {
+        LevelLayout layout = new LevelLayout(cells);
+        MazeAlgorithms.backtracker(layout, rnd);
+        MazeAlgorithms.braid(layout, rnd, braidRatio);
+        MazeAlgorithms.carveRooms(layout, rnd, roomCount, 3, maxRoomSize);
+        return this.finalizeLayout(layout, rnd, playerCount, chestsPerHundredCells);
+    }
+
+    /**
+     * Alternative Bauweise: offene Halle mit verstreuten Wandzuegen statt Gaenge-Labyrinth.
+     * Fuer Level mit "grosser offener Raum"-Charakter (Parkhaus, Poolrooms).
+     */
+    protected LevelLayout openLayout(
+        Random rnd,
+        int cells,
+        int playerCount,
+        int wallRunCount,
+        double chestsPerHundredCells
+    ) {
+        LevelLayout layout = new LevelLayout(cells);
+        MazeAlgorithms.openField(layout);
+        MazeAlgorithms.scatterWallRuns(layout, rnd, wallRunCount, 3, Math.max(5, cells / 4));
+        return this.finalizeLayout(layout, rnd, playerCount, chestsPerHundredCells);
+    }
+
+    /** Gemeinsame Platzierung: Spawns, Exit (+Kammer), Kisten, Konnektivitaet, Licht. */
+    protected LevelLayout finalizeLayout(LevelLayout layout, Random rnd, int playerCount, double chestsPerHundredCells) {
+        int cells = layout.getCells();
+
+        // Spawns: ueber die ganze Flaeche verteilt, damit auch viele Spieler nicht clustern
+        int[][] fromCorner = MazeAlgorithms.bfsDistances(layout, new int[]{1, 1});
+        List<int[]> allFloor = MazeAlgorithms.cellsInDistancePercentile(layout, fromCorner, 0, 1);
+        int spawnCount = Math.max(8, playerCount + 2);
+        layout.getSpawnCells().addAll(MazeAlgorithms.sampleSpread(allFloor, rnd, spawnCount, cells / 4.0));
+
+        // Exit: weit weg vom Spawn-Schwerpunkt
+        int[] centroid = this.spawnCentroid(layout);
+        int[][] fromCentroid = MazeAlgorithms.bfsDistances(layout, this.nearestWalkable(layout, centroid));
+        List<int[]> farCells = MazeAlgorithms.cellsInDistancePercentile(layout, fromCentroid, 0.8, 1.0);
+        int[] exit = farCells.isEmpty() ? allFloor.getLast() : farCells.get(rnd.nextInt(farCells.size()));
+        layout.setExitCell(exit);
+        layout.setCell(exit[0], exit[1], LevelLayout.Cell.EXIT);
+
+        int[] doorOutside = this.usesKeyDoor() ? this.buildExitChamber(layout, rnd, fromCentroid, allFloor) : null;
+
+        // Kisten verteilt ueber die Flaeche
+        int chestCount = (int) Math.max(3, cells * cells * chestsPerHundredCells / 100.0);
+        List<int[]> chestSpots = MazeAlgorithms.sampleSpread(allFloor, rnd, chestCount, cells / 6.0);
+        chestSpots.removeIf(cell -> layout.cellAt(cell[0], cell[1]) != LevelLayout.Cell.FLOOR);
+        // Kisten nie auf Spawn-Zellen — sonst steht der Barrel im Spieler
+        chestSpots.removeIf(cell -> layout.getSpawnCells().stream()
+            .anyMatch(spawn -> spawn[0] == cell[0] && spawn[1] == cell[1]));
+        layout.getChestCells().addAll(chestSpots);
+
+        // Die Kammer-Mauern (oder Pech beim Carven) koennen Bereiche abtrennen —
+        // alle spielrelevanten Zellen garantiert mit der Hauptkomponente verbinden
+        List<int[]> important = new ArrayList<>(layout.getSpawnCells());
+        important.addAll(layout.getChestCells());
+        if(layout.getKeyChestCell() != null) important.add(layout.getKeyChestCell());
+        if(doorOutside != null) important.add(doorOutside);
+        if(!this.usesKeyDoor()) important.add(layout.getExitCell());
+        MazeAlgorithms.ensureConnected(layout, layout.getSpawnCells().getFirst(), important);
+
+        // Lichtzellen im Raster, ausserhalb von Dunkelzonen (darkZones setzen Level-Impls vorher/nachher)
+        for(int x = 1; x < cells - 1; x += 2) {
+            for(int z = 1; z < cells - 1; z += 2) {
+                if(layout.isWalkable(x, z) && !layout.isDarkCell(x, z)) layout.getLightCells().add(new int[]{x, z});
+            }
+        }
+
+        return layout;
+    }
+
+    /**
+     * Ummauert die Exit-Zelle (3x3) und setzt genau einen DOOR-Zugang mit garantiert
+     * begehbarer Zelle davor; der Schluessel landet als Kiste im freien Bereich.
+     *
+     * @return die Zelle direkt vor der Tuer (fuer die Konnektivitaetspruefung)
+     */
+    private int[] buildExitChamber(LevelLayout layout, Random rnd, int[][] distances, List<int[]> allFloor) {
+        int[] exit = layout.getExitCell();
+
+        // Tuer-Richtung waehlen, bevor der Ring zugemauert wird: bevorzugt eine Richtung,
+        // deren Vorfeld-Zelle (exit + 2*dir) bereits begehbar ist
+        int[][] directions = {{1, 0}, {-1, 0}, {0, 1}, {0, -1}};
+        List<int[]> valid = new ArrayList<>();
+        List<int[]> preferred = new ArrayList<>();
+        for(int[] dir : directions) {
+            int outsideX = exit[0] + dir[0] * 2;
+            int outsideZ = exit[1] + dir[1] * 2;
+            if(outsideX <= 0 || outsideZ <= 0 || outsideX >= layout.getCells() - 1 || outsideZ >= layout.getCells() - 1) continue;
+            valid.add(dir);
+            if(layout.isWalkable(outsideX, outsideZ)) preferred.add(dir);
+        }
+        List<int[]> pool = preferred.isEmpty() ? valid : preferred;
+        int[] doorDir = pool.get(rnd.nextInt(pool.size()));
+
+        // Ring zumauern
+        for(int dx = -1; dx <= 1; dx++) {
+            for(int dz = -1; dz <= 1; dz++) {
+                if(dx == 0 && dz == 0) continue;
+                int x = exit[0] + dx;
+                int z = exit[1] + dz;
+                if(!layout.inBounds(x, z)) continue;
+                layout.setCell(x, z, LevelLayout.Cell.WALL);
+            }
+        }
+
+        int[] door = {exit[0] + doorDir[0], exit[1] + doorDir[1]};
+        int[] outside = {exit[0] + doorDir[0] * 2, exit[1] + doorDir[1] * 2};
+        layout.setCell(door[0], door[1], LevelLayout.Cell.DOOR);
+        layout.setDoorCell(door);
+        if(!layout.isWalkable(outside[0], outside[1])) layout.setCell(outside[0], outside[1], LevelLayout.Cell.FLOOR);
+
+        List<int[]> keySpots = MazeAlgorithms.cellsInDistancePercentile(layout, distances, 0.3, 0.7);
+        keySpots.removeIf(cell -> layout.cellAt(cell[0], cell[1]) != LevelLayout.Cell.FLOOR);
+        // Fallback nur auf Zellen, die nach dem Kammerbau noch begehbar sind
+        List<int[]> keyFallback = allFloor.stream()
+            .filter(cell -> layout.cellAt(cell[0], cell[1]) == LevelLayout.Cell.FLOOR)
+            .toList();
+        int[] keyCell = keySpots.isEmpty()
+            ? keyFallback.get(rnd.nextInt(keyFallback.size()))
+            : keySpots.get(rnd.nextInt(keySpots.size()));
+        layout.setKeyChestCell(keyCell);
+
+        return outside;
+    }
+
+    private int[] spawnCentroid(LevelLayout layout) {
+        int sumX = 0;
+        int sumZ = 0;
+        for(int[] spawn : layout.getSpawnCells()) {
+            sumX += spawn[0];
+            sumZ += spawn[1];
+        }
+        int count = Math.max(1, layout.getSpawnCells().size());
+        return new int[]{sumX / count, sumZ / count};
+    }
+
+    private int[] nearestWalkable(LevelLayout layout, int[] cell) {
+        if(layout.isWalkable(cell[0], cell[1])) return cell;
+        for(int radius = 1; radius < layout.getCells(); radius++) {
+            for(int dx = -radius; dx <= radius; dx++) {
+                for(int dz = -radius; dz <= radius; dz++) {
+                    int x = cell[0] + dx;
+                    int z = cell[1] + dz;
+                    if(layout.inBounds(x, z) && layout.isWalkable(x, z)) return new int[]{x, z};
+                }
+            }
+        }
+        return new int[]{1, 1};
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/level/LevelLayout.java

@@ -0,0 +1,187 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level;
+
+import net.minestom.server.coordinate.Pos;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+
+/**
+ * Vorab berechnetes Layout eines Levels auf einem quadratischen Zellenraster.
+ * Eine Zelle ist {@link #CELL_SIZE} Bloecke breit; das Raster ist um x=0/z=0 zentriert.
+ * Der Chunk-Generator liest ausschliesslich aus dieser Struktur.
+ */
+public class LevelLayout {
+    public static final int CELL_SIZE = 3;
+
+    public enum Cell {
+        WALL,
+        FLOOR,
+        WATER,
+        /** doppelt tiefes Wasserbecken */
+        DEEP_WATER,
+        PILLAR,
+        /** Deckenleitung (Kupfer-Kanal unter der Decke, darunter begehbar) */
+        PIPE,
+        /** duenne Wand (1 Block) durch die Zellenmitte entlang der X-Achse — Prototyp-Optik von Level 0 */
+        THIN_WALL_X,
+        /** duenne Wand (1 Block) durch die Zellenmitte entlang der Z-Achse */
+        THIN_WALL_Z,
+        /** einzelner Eckpfosten (1x1) in der Zellenmitte */
+        THIN_PILLAR,
+        /** undichte Leitung: Wassersaeule laeuft von der Decke bis in eine Bodenpfuetze */
+        LEAK,
+        /** Exit-Zelle: Wirkung haengt vom TransitionType des Levels ab (Loch, Leiter, Glitch, NoClip-Wand) */
+        EXIT,
+        /** verschlossener Zugang zur Exit-Kammer, wird vom DoorManager geoeffnet */
+        DOOR
+    }
+
+    private final int cells;
+    private final Cell[][] grid;
+    private final boolean[][] darkZone;
+
+    private final List<int[]> spawnCells = new ArrayList<>();
+    private final List<int[]> chestCells = new ArrayList<>();
+    private final List<int[]> lightCells = new ArrayList<>();
+    /** frei nutzbare Level-Marker (z. B. Dampf-Ventile in den Poolrooms) */
+    private final List<int[]> markerCells = new ArrayList<>();
+    private int[] exitCell;
+    private int[] keyChestCell;
+    private int[] doorCell;
+
+    // Generierungs-Bounds: ausserhalb rendert der Generator nichts (Finale nutzt
+    // nur einen schmalen Korridor seines quadratischen Rasters)
+    private int minGenCx = 0;
+    private int maxGenCx = Integer.MAX_VALUE;
+    private int minGenCz = 0;
+    private int maxGenCz = Integer.MAX_VALUE;
+
+    public LevelLayout(int cells) {
+        this.cells = cells;
+        this.grid = new Cell[cells][cells];
+        this.darkZone = new boolean[cells][cells];
+        for(int x = 0; x < cells; x++) {
+            for(int z = 0; z < cells; z++) {
+                this.grid[x][z] = Cell.WALL;
+            }
+        }
+    }
+
+    public int getCells() {
+        return this.cells;
+    }
+
+    public boolean inBounds(int cx, int cz) {
+        return cx >= 0 && cx < this.cells && cz >= 0 && cz < this.cells;
+    }
+
+    public Cell cellAt(int cx, int cz) {
+        if(!this.inBounds(cx, cz)) return Cell.WALL;
+        return this.grid[cx][cz];
+    }
+
+    public void setCell(int cx, int cz, Cell cell) {
+        this.grid[cx][cz] = cell;
+    }
+
+    public boolean isWalkable(int cx, int cz) {
+        return switch(this.cellAt(cx, cz)) {
+            case FLOOR, WATER, DEEP_WATER, PIPE, LEAK, EXIT -> true;
+            default -> false;
+        };
+    }
+
+
+    public boolean isDarkCell(int cx, int cz) {
+        return this.inBounds(cx, cz) && this.darkZone[cx][cz];
+    }
+
+    public void setDark(int cx, int cz, boolean dark) {
+        this.darkZone[cx][cz] = dark;
+    }
+
+    /**
+     * Weltkoordinate (Block-Ecke) der Zelle; das Raster ist um den Ursprung zentriert.
+     */
+    public int worldX(int cx) {
+        return (cx - this.cells / 2) * CELL_SIZE;
+    }
+
+    public int worldZ(int cz) {
+        return this.worldX(cz);
+    }
+
+    /** Zellkoordinate zu einer Block-Weltkoordinate */
+    public int cellX(double worldX) {
+        return (int) Math.floor(worldX / CELL_SIZE) + this.cells / 2;
+    }
+
+    public int cellZ(double worldZ) {
+        return this.cellX(worldZ);
+    }
+
+    /** Spieler-Position in der Zellenmitte, einen Block ueber dem Boden */
+    public Pos worldCenter(int[] cell, int baseY) {
+        return new Pos(this.worldX(cell[0]) + CELL_SIZE / 2.0, baseY + 2, this.worldZ(cell[1]) + CELL_SIZE / 2.0);
+    }
+
+    public boolean isDarkAt(Pos position) {
+        return this.isDarkCell(this.cellX(position.x()), this.cellZ(position.z()));
+    }
+
+    public List<int[]> getSpawnCells() {
+        return this.spawnCells;
+    }
+
+    public List<int[]> getChestCells() {
+        return this.chestCells;
+    }
+
+    public List<int[]> getLightCells() {
+        return this.lightCells;
+    }
+
+    public List<int[]> getMarkerCells() {
+        return this.markerCells;
+    }
+
+    public int[] getExitCell() {
+        return this.exitCell;
+    }
+
+    public void setExitCell(int[] exitCell) {
+        this.exitCell = exitCell;
+    }
+
+    public int[] getKeyChestCell() {
+        return this.keyChestCell;
+    }
+
+    public int[] getDoorCell() {
+        return this.doorCell;
+    }
+
+    public void setDoorCell(int[] doorCell) {
+        this.doorCell = doorCell;
+    }
+
+    public void setKeyChestCell(int[] keyChestCell) {
+        this.keyChestCell = keyChestCell;
+    }
+
+    public void setGenerationBounds(int minCx, int maxCx, int minCz, int maxCz) {
+        this.minGenCx = minCx;
+        this.maxGenCx = maxCx;
+        this.minGenCz = minCz;
+        this.maxGenCz = maxCz;
+    }
+
+    public boolean inGenerationBounds(int cx, int cz) {
+        return cx >= this.minGenCx && cx <= this.maxGenCx && cz >= this.minGenCz && cz <= this.maxGenCz;
+    }
+
+    public int[] randomSpawnCell(Random rnd) {
+        return this.spawnCells.get(rnd.nextInt(this.spawnCells.size()));
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/level/LevelPalette.java

@@ -0,0 +1,56 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level;
+
+import net.minestom.server.instance.block.Block;
+
+import java.util.List;
+import java.util.Random;
+
+/**
+ * Blockauswahl eines Levels. Listen erlauben leichte Variation (z. B. fleckiger Teppich);
+ * die Auswahl erfolgt deterministisch aus dem Layout-Random.
+ *
+ * Fuer eine deutliche visuelle Identitaet pro Leveltyp:
+ * - wallBase: abweichende unterste Wandschicht (Sockelleiste)
+ * - checkerFloor: Schachbrettmuster aus den ersten beiden floor-Eintraegen
+ * - floorDeco/ceilingDeco: seltene Deko-Bloecke auf dem Boden bzw. unter der Decke
+ */
+public record LevelPalette(
+    List<Block> floor,
+    List<Block> wall,
+    List<Block> ceiling,
+    Block light,
+    Block pillar,
+    int roomHeight,
+    Block wallBase,
+    boolean checkerFloor,
+    List<Block> floorDeco,
+    double floorDecoChance,
+    List<Block> ceilingDeco,
+    double ceilingDecoChance
+) {
+
+    public Block rndFloor(Random rnd) {
+        return this.floor.get(rnd.nextInt(this.floor.size()));
+    }
+
+    public Block floorAt(int worldX, int worldZ, Random rnd) {
+        if(!this.checkerFloor) return this.rndFloor(rnd);
+        return this.floor.get(Math.floorMod(worldX + worldZ, 2));
+    }
+
+    public Block rndWall(Random rnd) {
+        return this.wall.get(rnd.nextInt(this.wall.size()));
+    }
+
+    public Block rndCeiling(Random rnd) {
+        return this.ceiling.get(rnd.nextInt(this.ceiling.size()));
+    }
+
+    public Block rndFloorDeco(Random rnd) {
+        return this.floorDeco.get(rnd.nextInt(this.floorDeco.size()));
+    }
+
+    public Block rndCeilingDeco(Random rnd) {
+        return this.ceilingDeco.get(rnd.nextInt(this.ceilingDeco.size()));
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/level/LevelRuntime.java

@@ -0,0 +1,87 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.BackroomsGame;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.BackroomsMonster;
+import net.minestom.server.coordinate.Pos;
+import net.minestom.server.entity.Player;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+
+/**
+ * Laufzeit-Zustand eines Levels innerhalb einer Runde: Layout, Hoehenlage,
+ * aktive Monster und Level-Events. Die Level sind in einer Instanz vertikal gestapelt.
+ */
+public class LevelRuntime {
+    public static final int LEVEL_HEIGHT = 24;
+    public static final int TOP_BASE_Y = 96;
+
+    private final BackroomsGame game;
+    private final int index;
+    private final LevelDefinition definition;
+    private final LevelLayout layout;
+    private final Random rnd;
+    private final List<BackroomsMonster> monsters = new ArrayList<>();
+
+    private boolean blackoutActive = false;
+
+
+    public LevelRuntime(BackroomsGame game, int index, LevelDefinition definition, LevelLayout layout, Random rnd) {
+        this.game = game;
+        this.index = index;
+        this.definition = definition;
+        this.layout = layout;
+        this.rnd = rnd;
+    }
+
+    public static int baseY(int index) {
+        return TOP_BASE_Y - index * LEVEL_HEIGHT;
+    }
+
+    public int getBaseY() {
+        return baseY(this.index);
+    }
+
+    public int getIndex() {
+        return this.index;
+    }
+
+    public LevelDefinition getDefinition() {
+        return this.definition;
+    }
+
+    public LevelLayout getLayout() {
+        return this.layout;
+    }
+
+    public Random getRnd() {
+        return this.rnd;
+    }
+
+    public List<BackroomsMonster> getMonsters() {
+        return this.monsters;
+    }
+
+    public boolean isBlackoutActive() {
+        return this.blackoutActive;
+    }
+
+    public void setBlackoutActive(boolean blackoutActive) {
+        this.blackoutActive = blackoutActive;
+    }
+
+
+    public List<Player> playersInLevel() {
+        return this.game.playersInLevel(this.index);
+    }
+
+    /** Spieler-Position (Zellenmitte) fuer eine Layout-Zelle dieses Levels */
+    public Pos toPlayerPos(int[] cell) {
+        return this.layout.worldCenter(cell, this.getBaseY());
+    }
+
+    public Pos randomSpawn() {
+        return this.toPlayerPos(this.layout.randomSpawnCell(this.rnd));
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/level/LevelType.java

@@ -0,0 +1,25 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level;
+
+/**
+ * Alle implementierten Backrooms-Level. LOBBY ist immer das Startlevel,
+ * FINALE immer das letzte; der Pool dazwischen steht in BackroomsGame.LEVEL_POOL.
+ */
+public enum LevelType {
+    LOBBY("level_lobby"),
+    HABITABLE_ZONE("level_habitable"),
+    PIPE_DREAMS("level_pipeDreams"),
+    POOLROOMS("level_poolrooms"),
+    LIGHTS_OUT("level_lightsOut"),
+    FUN("level_fun"),
+    FINALE("level_finale");
+
+    private final String translationKey;
+
+    LevelType(String translationKey) {
+        this.translationKey = translationKey;
+    }
+
+    public String translationKey() {
+        return "game_Backrooms#" + this.translationKey;
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/level/TransitionType.java

@@ -0,0 +1,15 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level;
+
+/**
+ * Art des Level-Ausgangs an der Exit-Zelle.
+ */
+public enum TransitionType {
+    /** Loch im Boden: offener Schacht, der Spieler faellt physisch ins naechste Level */
+    HOLE,
+    /** Leiter-Schacht nach unten */
+    LADDER,
+    /** flackernder "Glitch"-Boden: Betreten teleportiert */
+    GLITCH_FLOOR,
+    /** Finale: Ziel-Region erreichen = entkommen */
+    ESCAPE
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/level/impl/Cells.java

@@ -0,0 +1,113 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.impl;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.generator.MazeAlgorithms;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelLayout;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+import java.util.function.BiPredicate;
+
+/**
+ * Gemeinsame Zellen-Hilfen der Level-Implementierungen: Monster-Platzierung fern
+ * der Spawns und Schutz reservierter Zellen (Spawns, Kisten, Schluessel-Kiste).
+ */
+final class Cells {
+    private static final int MONSTER_MIN_SPAWN_DISTANCE = 10;
+
+    private Cells() {
+    }
+
+    /**
+     * Zufaellige begehbare Zellen mit Mindestabstand (> 10 Zellen) zu allen Spawns;
+     * der Abstand wird schrittweise gesenkt, falls sich sonst zu wenige Zellen finden.
+     */
+    static List<int[]> farWalkable(LevelLayout layout, Random rnd, int count) {
+        return far(layout, rnd, count, (x, z) -> true);
+    }
+
+    /**
+     * Flaechen-Faktor fuer Monsteranzahlen: grosse Karten (mehr Spieler) brauchen
+     * proportional mehr Monster, sonst wirken sie leer.
+     */
+    static int areaScale(LevelLayout layout) {
+        return Math.max(1, layout.getCells() / 16);
+    }
+
+    /** Wie {@link #farWalkable}, zusaetzlich gefiltert; liefert notfalls weniger als count Zellen. */
+    static List<int[]> far(LevelLayout layout, Random rnd, int count, BiPredicate<Integer, Integer> filter) {
+        for(int minDistance = MONSTER_MIN_SPAWN_DISTANCE; ; minDistance -= 2) {
+            List<int[]> candidates = new ArrayList<>();
+            for(int x = 0; x < layout.getCells(); x++) {
+                for(int z = 0; z < layout.getCells(); z++) {
+                    if(!layout.isWalkable(x, z) || !filter.test(x, z)) continue;
+                    if(distanceToSpawns(layout, x, z) > minDistance) candidates.add(new int[]{x, z});
+                }
+            }
+            if(candidates.size() >= count || minDistance <= 0) {
+                // Paarweiser Mindestabstand, damit die Monster nicht am selben Fleck stehen
+                double spread = Math.max(4, layout.getCells() / 8.0);
+                return MazeAlgorithms.sampleSpread(candidates, rnd, count, spread);
+            }
+        }
+    }
+
+    static double distanceToSpawns(LevelLayout layout, int cx, int cz) {
+        double min = Double.MAX_VALUE;
+        for(int[] spawn : layout.getSpawnCells()) {
+            double dx = cx - spawn[0];
+            double dz = cz - spawn[1];
+            min = Math.min(min, Math.sqrt(dx * dx + dz * dz));
+        }
+        return min;
+    }
+
+    /** Zelle ist als Spawn, Kiste oder Schluessel-Kiste reserviert und darf nicht ueberbaut werden. */
+    static boolean reserved(LevelLayout layout, int cx, int cz) {
+        int[] keyChest = layout.getKeyChestCell();
+        return contains(layout.getSpawnCells(), cx, cz)
+            || contains(layout.getChestCells(), cx, cz)
+            || (keyChest != null && keyChest[0] == cx && keyChest[1] == cz);
+    }
+
+    static boolean contains(List<int[]> cells, int cx, int cz) {
+        for(int[] cell : cells) {
+            if(cell[0] == cx && cell[1] == cz) return true;
+        }
+        return false;
+    }
+
+    static int openOrthogonal(LevelLayout layout, int cx, int cz) {
+        int open = 0;
+        if(layout.isWalkable(cx + 1, cz)) open++;
+        if(layout.isWalkable(cx - 1, cz)) open++;
+        if(layout.isWalkable(cx, cz + 1)) open++;
+        if(layout.isWalkable(cx, cz - 1)) open++;
+        return open;
+    }
+
+    static void removeLight(LevelLayout layout, int cx, int cz) {
+        layout.getLightCells().removeIf(cell -> cell[0] == cx && cell[1] == cz);
+    }
+
+    /**
+     * Stempelt kreisfoermige Dunkelzonen ins Layout und entfernt dort die Beleuchtung.
+     */
+    static void darkBlobs(LevelLayout layout, Random rnd, int count, int minRadius, int maxRadius) {
+        int cells = layout.getCells();
+        for(int i = 0; i < count; i++) {
+            int centerX = 3 + rnd.nextInt(Math.max(1, cells - 6));
+            int centerZ = 3 + rnd.nextInt(Math.max(1, cells - 6));
+            int radius = minRadius + rnd.nextInt(Math.max(1, maxRadius - minRadius + 1));
+            for(int x = centerX - radius; x <= centerX + radius; x++) {
+                for(int z = centerZ - radius; z <= centerZ + radius; z++) {
+                    if(!layout.inBounds(x, z)) continue;
+                    double dx = x - centerX;
+                    double dz = z - centerZ;
+                    if(Math.sqrt(dx * dx + dz * dz) <= radius) layout.setDark(x, z, true);
+                }
+            }
+        }
+        layout.getLightCells().removeIf(cell -> layout.isDarkCell(cell[0], cell[1]));
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/level/impl/Level0Lobby.java

@@ -0,0 +1,151 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.impl;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.BackroomsGame;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.ambience.AmbienceProfile;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.generator.MazeAlgorithms;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelDefinition;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelLayout;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelPalette;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelType;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.TransitionType;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Bacteria;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.BackroomsMonster;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Hound;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Smiler;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.sound.SoundEvent;
+
+import java.util.List;
+import java.util.Random;
+
+/**
+ * Level 0 "The Lobby": endlose Raumfluchten im Stil des urspruenglichen Prototyps —
+ * duenne Sandsteinwaende mit Tuerluecken im Raster, heller Wollteppich, summende
+ * Deckenlampen, dazu dunkle Blackout-Zonen mit lauernden Smilern.
+ * Ausgang: Loch im Boden hinter einer verschlossenen Tuer.
+ */
+public class Level0Lobby extends LevelDefinition {
+    // Palette nach dem urspruenglichen Prototyp: heller Wollboden, Smooth Sandstone,
+    // Sea Lanterns im Deckenraster, gemeisselte Sandstein-Eckpfosten
+    private static final LevelPalette PALETTE = new LevelPalette(
+        List.of(Block.LIGHT_GRAY_WOOL, Block.LIGHT_GRAY_WOOL, Block.LIGHT_GRAY_WOOL, Block.BROWN_WOOL),
+        List.of(Block.SMOOTH_SANDSTONE, Block.SMOOTH_SANDSTONE, Block.SMOOTH_SANDSTONE, Block.SANDSTONE),
+        List.of(Block.SMOOTH_STONE, Block.SMOOTH_STONE, Block.STONE),
+        Block.SEA_LANTERN,
+        Block.CHISELED_SANDSTONE,
+        3,
+        Block.SMOOTH_SANDSTONE,
+        false,
+        List.of(Block.COBWEB),
+        0.008,
+        List.of(),
+        0
+    );
+
+    /** Rasterweite des Prototyp-Wandmusters (in Zellen) */
+    private static final int SEGMENT_GRID = 3;
+
+    @Override
+    public LevelType type() {
+        return LevelType.LOBBY;
+    }
+
+    /**
+     * Generierung nach dem urspruenglichen Prototyp: offene Flaeche, in die ein
+     * 4-Zellen-Raster aus duennen Sandsteinwand-Segmenten mit zufaelligen
+     * Tuerluecken und Eckpfosten gelegt wird — statt eines Gaenge-Labyrinths.
+     */
+    @Override
+    public LevelLayout buildLayout(Random rnd, int cells, int playerCount) {
+        LevelLayout layout = new LevelLayout(cells);
+        MazeAlgorithms.openField(layout);
+
+        // Eckpfosten an den Rasterpunkten
+        for(int gx = SEGMENT_GRID; gx < cells - 1; gx += SEGMENT_GRID) {
+            for(int gz = SEGMENT_GRID; gz < cells - 1; gz += SEGMENT_GRID) {
+                layout.setCell(gx, gz, LevelLayout.Cell.THIN_PILLAR);
+
+                // je Richtung: ~83% vorhanden, davon die Haelfte mit Tuerluecke
+                this.carveSegment(layout, rnd, gx, gz, true);
+                this.carveSegment(layout, rnd, gx, gz, false);
+            }
+        }
+
+        this.finalizeLayout(layout, rnd, playerCount, 2);
+
+        // Blackout-Zonen: dunkle Flecken, in denen die Deckenbeleuchtung fehlt
+        Cells.darkBlobs(layout, rnd, 2 + rnd.nextInt(3), 3, 6);
+
+        return layout;
+    }
+
+
+    /** Ein Wandsegment vom Rasterpunkt aus entlang +x bzw. +z, mit optionaler Tuerluecke. */
+    private void carveSegment(LevelLayout layout, Random rnd, int gx, int gz, boolean alongX) {
+        if(rnd.nextInt(6) == 0) return;
+        int cells = layout.getCells();
+        int gap = rnd.nextInt(2) == 0 ? 1 + rnd.nextInt(SEGMENT_GRID - 1) : -1;
+        for(int step = 1; step < SEGMENT_GRID; step++) {
+            int x = alongX ? gx + step : gx;
+            int z = alongX ? gz : gz + step;
+            if((alongX ? x : z) >= cells - 1 || step == gap) continue;
+            if(layout.cellAt(x, z) == LevelLayout.Cell.FLOOR) {
+                layout.setCell(x, z, alongX ? LevelLayout.Cell.THIN_WALL_X : LevelLayout.Cell.THIN_WALL_Z);
+            }
+        }
+    }
+
+    @Override
+    public LevelPalette palette() {
+        return PALETTE;
+    }
+
+    @Override
+    public TransitionType transitionType() {
+        return TransitionType.HOLE;
+    }
+
+    @Override
+    public boolean usesKeyDoor() {
+        return true;
+    }
+
+    /** Smiler lauern in den Blackout-Zonen; vereinzelt steht eine Bacteria als "Wand" herum. */
+    @Override
+    public void populateMonsters(BackroomsGame game, LevelRuntime runtime, int density) {
+        LevelLayout layout = runtime.getLayout();
+        for(int[] cell : Cells.far(layout, runtime.getRnd(), density * Cells.areaScale(layout), layout::isDarkCell)) {
+            Smiler smiler = new Smiler(runtime);
+            smiler.spawnAtCell(game, cell);
+            runtime.getMonsters().add(smiler);
+        }
+        for(int[] cell : Cells.farWalkable(layout, runtime.getRnd(), Math.max(1, density - 1))) {
+            Bacteria bacteria = new Bacteria(runtime);
+            bacteria.spawnAtCell(game, cell);
+            runtime.getMonsters().add(bacteria);
+        }
+    }
+
+    /** Nachschub: Smiler in Dunkelzonen, in den hellen Fluren selten Hound oder Bacteria. */
+    @Override
+    public BackroomsMonster createRoamingMonster(LevelRuntime runtime, int[] cell) {
+        if(runtime.getLayout().isDarkCell(cell[0], cell[1])) return new Smiler(runtime);
+        int roll = runtime.getRnd().nextInt(100);
+        if(roll < 20) return new Hound(runtime);
+        if(roll < 35) return new Bacteria(runtime);
+        return null;
+    }
+
+    @Override
+    public AmbienceProfile ambience() {
+        return new AmbienceProfile(
+            SoundEvent.BLOCK_BEACON_AMBIENT,
+            0.15f,
+            0.5f,
+            8,
+            List.of(SoundEvent.AMBIENT_CAVE, SoundEvent.BLOCK_WOODEN_DOOR_OPEN, SoundEvent.BLOCK_STONE_STEP),
+            0.015
+        );
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/level/impl/LevelFinale.java

@@ -0,0 +1,368 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.impl;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.BackroomsGame;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.ambience.AmbienceProfile;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.generator.MazeAlgorithms;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelDefinition;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelLayout;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelPalette;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelType;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.TransitionType;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.BackroomsMonster;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Deathmoth;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Hound;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Partygoer;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.ambience.Jumpscare;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Smiler;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Wretch;
+import eu.mhsl.minenet.minigames.message.type.ActionBarMessage;
+import eu.mhsl.minenet.minigames.message.type.TitleMessage;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.BackroomsPlayer;
+import net.kyori.adventure.sound.Sound;
+import net.kyori.adventure.text.Component;
+import net.minestom.server.entity.Player;
+import net.minestom.server.entity.damage.DamageType;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.sound.SoundEvent;
+
+import java.time.Duration;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+import java.util.Random;
+
+/**
+ * Level ! "Run For Your Life": ein langer Krankenhauskorridor. Hinter den Spielern
+ * frisst sich eine toedliche Zone mit steigendem Tempo den Gang entlang — wer das
+ * Ende erreicht, ist entkommen und gewinnt.
+ */
+public class LevelFinale extends LevelDefinition {
+    private static final int CORRIDOR_CELLS = 67;
+    /** Vorsprung in Sekunden, bevor Meute und Todeszone losgelassen werden */
+    private static final int HEAD_START_SECONDS = 12;
+    /** Wer diese Distanz vor dem Ende des Countdowns laeuft, loest seine Jagd sofort aus */
+    private static final double RELEASE_DISTANCE = 12;
+    private static final double ZONE_BASE_SPEED = 1.2;
+    private static final double ZONE_ACCELERATION = 0.04;
+    private static final double ZONE_MAX_SPEED = 4.5;
+
+    /** Sekunden Dunkelheit, bevor der Duell-Smiler erscheint */
+    private static final int CHALLENGE_DELAY_SECONDS = 4;
+
+    private final List<int[]> challengeRooms = new ArrayList<>();
+    private final Map<UUID, Integer> challengeTimers = new HashMap<>();
+    private final Map<UUID, Smiler> challengeSmilers = new HashMap<>();
+
+    private static final LevelPalette PALETTE = new LevelPalette(
+        List.of(Block.WHITE_CONCRETE, Block.WHITE_CONCRETE, Block.LIGHT_GRAY_CONCRETE),
+        List.of(Block.WHITE_CONCRETE, Block.QUARTZ_BLOCK, Block.QUARTZ_BLOCK),
+        List.of(Block.LIGHT_GRAY_CONCRETE),
+        Block.SEA_LANTERN,
+        Block.QUARTZ_PILLAR,
+        4,
+        Block.LIGHT_BLUE_CONCRETE,
+        false,
+        List.of(Block.COBWEB),
+        0.02,
+        List.of(),
+        0
+    );
+
+    @Override
+    public LevelType type() {
+        return LevelType.FINALE;
+    }
+
+    @Override
+    public LevelLayout buildLayout(Random rnd, int cells, int playerCount) {
+        LevelLayout layout = new LevelLayout(CORRIDOR_CELLS);
+
+        // Korridorbreite skaliert mit der Spielerzahl (2 Zellen = 6 Bloecke bis 8 Zellen = 24)
+        int widthCells = Math.clamp(2 + playerCount / 8, 2, 8);
+        int zStart = (CORRIDOR_CELLS - widthCells) / 2;
+
+        for(int x = 1; x < CORRIDOR_CELLS - 1; x++) {
+            for(int z = zStart; z < zStart + widthCells; z++) {
+                layout.setCell(x, z, LevelLayout.Cell.FLOOR);
+            }
+        }
+
+        // Hindernisse: einzelne Pfeiler-Zellen im Laufweg
+        for(int x = 8; x < CORRIDOR_CELLS - 6; x += 3 + rnd.nextInt(4)) {
+            int z = zStart + rnd.nextInt(widthCells);
+            layout.setCell(x, z, LevelLayout.Cell.PILLAR);
+        }
+
+        // Alle Spieler starten am linken Ende
+        for(int z = zStart; z < zStart + widthCells; z++) {
+            layout.getSpawnCells().add(new int[]{2, z});
+            layout.getSpawnCells().add(new int[]{3, z});
+        }
+
+        // Nur der Korridor + Kammern wird generiert — nicht die ~90 % toten WALL-Zellen des Rasters
+        layout.setGenerationBounds(0, CORRIDOR_CELLS - 1, zStart - 6, zStart + widthCells + 5);
+
+        layout.setExitCell(new int[]{CORRIDOR_CELLS - 2, zStart + widthCells / 2});
+        layout.setCell(CORRIDOR_CELLS - 2, zStart + widthCells / 2, LevelLayout.Cell.EXIT);
+
+        // Pickups (Energy Bars/Almond Water) entlang der Strecke
+        List<int[]> floorCells = new ArrayList<>();
+        for(int x = 6; x < CORRIDOR_CELLS - 4; x++) {
+            for(int z = zStart; z < zStart + widthCells; z++) {
+                if(layout.cellAt(x, z) == LevelLayout.Cell.FLOOR) floorCells.add(new int[]{x, z});
+            }
+        }
+        layout.getChestCells().addAll(MazeAlgorithms.sampleSpread(floorCells, rnd, 8, 6));
+
+        // Sparsame Beleuchtung in der Gangmitte
+        for(int x = 4; x < CORRIDOR_CELLS - 2; x += 5) {
+            layout.getLightCells().add(new int[]{x, zStart + widthCells / 2});
+        }
+
+        // Seitentueren zu dunklen Duell-Kammern: wer (mit Key) eintritt und den
+        // dort spawnenden Smiler toetet, entkommt ebenfalls
+        int doors = 3 + rnd.nextInt(3);
+        for(int i = 0; i < doors; i++) {
+            int x = 10 + i * (CORRIDOR_CELLS - 20) / doors + rnd.nextInt(4);
+            boolean north = rnd.nextBoolean();
+            int wallZ = north ? zStart - 1 : zStart + widthCells;
+            int direction = north ? -1 : 1;
+            if(!layout.inBounds(x, wallZ + direction * 3)) continue;
+            if(layout.cellAt(x, wallZ) != LevelLayout.Cell.WALL) continue;
+
+            layout.setCell(x, wallZ, LevelLayout.Cell.DOOR);
+            for(int dx = -1; dx <= 1; dx++) {
+                for(int step = 1; step <= 3; step++) {
+                    int roomZ = wallZ + direction * step;
+                    if(!layout.inBounds(x + dx, roomZ)) continue;
+                    layout.setCell(x + dx, roomZ, LevelLayout.Cell.FLOOR);
+                    layout.setDark(x + dx, roomZ, true);
+                }
+            }
+            // {RaumzentrumX, RaumzentrumZ, TuerzellenX, TuerzellenZ}
+            this.challengeRooms.add(new int[]{x, wallZ + direction * 2, x, wallZ});
+        }
+
+        return layout;
+    }
+
+    /**
+     * Verschliesst die Kammertuer endgueltig: Tuerbloecke zurueck, Zelle wird Wand —
+     * der DoorManager oeffnet sie nie wieder, die Meute bleibt draussen.
+     */
+    private void sealDoor(BackroomsGame game, LevelRuntime runtime, int[] room) {
+        LevelLayout layout = runtime.getLayout();
+        int doorCx = room[2];
+        int doorCz = room[3];
+        if(layout.cellAt(doorCx, doorCz) == LevelLayout.Cell.WALL) return;
+
+        int doorX = layout.worldX(doorCx) + 1;
+        int doorZ = layout.worldZ(doorCz) + 1;
+        game.setBlock(doorX, runtime.getBaseY() + 2, doorZ, Block.IRON_DOOR.withProperties(Map.of("half", "lower", "facing", "north")));
+        game.setBlock(doorX, runtime.getBaseY() + 3, doorZ, Block.IRON_DOOR.withProperties(Map.of("half", "upper", "facing", "north")));
+        layout.setCell(doorCx, doorCz, LevelLayout.Cell.WALL);
+
+        game.playSound(Sound.sound(SoundEvent.BLOCK_IRON_DOOR_CLOSE, Sound.Source.BLOCK, 1.2f, 0.6f),
+            doorX, runtime.getBaseY() + 2, doorZ);
+    }
+
+    /** Zentrum der Duell-Kammer, in der der Spieler gerade steht — oder null. */
+    private int[] challengeRoomAt(LevelLayout layout, Player player) {
+        int cx = layout.cellX(player.getPosition().x());
+        int cz = layout.cellZ(player.getPosition().z());
+        for(int[] center : this.challengeRooms) {
+            if(Math.abs(cx - center[0]) <= 1 && Math.abs(cz - center[1]) <= 1) return center;
+        }
+        return null;
+    }
+
+    @Override
+    public LevelPalette palette() {
+        return PALETTE;
+    }
+
+    @Override
+    public TransitionType transitionType() {
+        return TransitionType.ESCAPE;
+    }
+
+    /** Schaltet die 10%-Key-Chance der Strecken-Barrels frei (fuer die Duell-Tueren). */
+    @Override
+    public boolean usesKeyDoor() {
+        return true;
+    }
+
+    @Override
+    public boolean opensSingleDoors() {
+        return true;
+    }
+
+    /**
+     * Jeder Spieler hat seine EIGENE Verfolgungsjagd: eigener Countdown, eigene Zone,
+     * eigene Meute. Freigabe entweder nach dem Vorsprungs-Countdown oder frueher,
+     * sobald der Spieler die ersten Meter gelaufen ist. Nachzuegler und Respawns
+     * starten dadurch immer fair mit eigenem Vorsprung.
+     */
+    @Override
+    public void onLevelTick(BackroomsGame game, LevelRuntime runtime) {
+        LevelLayout layout = runtime.getLayout();
+        double startX = layout.worldX(2);
+
+        for(Player player : runtime.playersInLevel()) {
+            BackroomsPlayer state = game.playerState(player);
+            if(state == null) continue;
+
+            // Ankunft: Sirene, Countdown beginnt
+            if(state.getFinaleSeconds() == BackroomsPlayer.FINALE_NOT_STARTED) {
+                state.setFinaleSeconds(-HEAD_START_SECONDS);
+                player.playSound(Sound.sound(SoundEvent.EVENT_RAID_HORN, Sound.Source.HOSTILE, 1f, 0.8f), Sound.Emitter.self());
+                continue;
+            }
+
+            int seconds = state.getFinaleSeconds() + 1;
+            state.setFinaleSeconds(seconds);
+
+            if(seconds < 0) {
+                // Wer schon losgelaufen ist, loest seine Jagd sofort aus
+                if(player.getPosition().x() > startX + RELEASE_DISTANCE) {
+                    seconds = 0;
+                    state.setFinaleSeconds(0);
+                } else {
+                    new ActionBarMessage()
+                        .appendTranslated("game_Backrooms#finaleCountdown")
+                        .appendStatic(Component.text(" " + (-seconds)))
+                        .send(player);
+                    player.playSound(Sound.sound(SoundEvent.BLOCK_NOTE_BLOCK_HAT, Sound.Source.AMBIENT, 1f, 1f), Sound.Emitter.self());
+                    continue;
+                }
+            }
+
+            // Freigabe: "RENN!", persoenliche Meute hinter dem Spieler, Zone startet
+            if(seconds == 0) {
+                player.playSound(Sound.sound(SoundEvent.ENTITY_GENERIC_EXPLODE, Sound.Source.HOSTILE, 1.5f, 0.5f), Sound.Emitter.self());
+                new TitleMessage(Duration.ofSeconds(2)).appendTranslated("game_Backrooms#finaleRun").send(player);
+                state.setFinaleZoneX(Math.max(layout.worldX(0), player.getPosition().x() - 14));
+                this.spawnPackBehind(game, runtime, player);
+                continue;
+            }
+
+            // In einer Duell-Kammer pausiert die persoenliche Zone — dort zaehlt nur der Smiler
+            if(this.tickChallenge(game, runtime, player)) continue;
+
+            double speed = Math.min(ZONE_MAX_SPEED, ZONE_BASE_SPEED + seconds * ZONE_ACCELERATION);
+            state.setFinaleZoneX(state.getFinaleZoneX() + speed);
+
+            if(seconds % 2 == 0) {
+                player.playSound(Sound.sound(SoundEvent.BLOCK_NOTE_BLOCK_PLING, Sound.Source.AMBIENT, 1f, 2f), Sound.Emitter.self());
+            }
+            double distance = player.getPosition().x() - state.getFinaleZoneX();
+            if(distance < 0) {
+                player.damage(DamageType.MOB_ATTACK, 3);
+                player.playSound(Sound.sound(SoundEvent.ENTITY_WARDEN_ATTACK_IMPACT, Sound.Source.HOSTILE, 1f, 0.7f), Sound.Emitter.self());
+            } else if(distance < 15) {
+                player.playSound(Sound.sound(SoundEvent.ENTITY_WARDEN_HEARTBEAT, Sound.Source.HOSTILE, 1.2f, 0.8f), Sound.Emitter.self());
+            }
+        }
+    }
+
+    /**
+     * Duell-Kammer: nach kurzer Dunkelheit erscheint ein an den Spieler gebundener
+     * Smiler — wer ihn toetet, ist entkommen.
+     *
+     * @return true, wenn der Spieler gerade im Duell steckt (Zone pausiert dann)
+     */
+    private boolean tickChallenge(BackroomsGame game, LevelRuntime runtime, Player player) {
+        // Sieg-Check unabhaengig vom Aufenthaltsort
+        Smiler smiler = this.challengeSmilers.get(player.getUuid());
+        if(smiler != null && (smiler.isDead() || smiler.isRemoved())) {
+            this.challengeSmilers.remove(player.getUuid());
+            game.escape(player);
+            return true;
+        }
+
+        LevelLayout layout = runtime.getLayout();
+        int[] room = this.challengeRoomAt(layout, player);
+        if(room == null) {
+            this.challengeTimers.remove(player.getUuid());
+            return false;
+        }
+
+        if(smiler != null) return true;
+
+        Integer timer = this.challengeTimers.get(player.getUuid());
+        if(timer == null) {
+            this.challengeTimers.put(player.getUuid(), CHALLENGE_DELAY_SECONDS);
+            // Die Tuer faellt hinter dir zu — und geht nie wieder auf
+            this.sealDoor(game, runtime, room);
+            player.playSound(Sound.sound(SoundEvent.BLOCK_SCULK_SHRIEKER_SHRIEK, Sound.Source.HOSTILE, 0.8f, 0.5f), Sound.Emitter.self());
+            return true;
+        }
+
+        if(timer > 1) {
+            this.challengeTimers.put(player.getUuid(), timer - 1);
+            player.playSound(Sound.sound(SoundEvent.ENTITY_WARDEN_HEARTBEAT, Sound.Source.HOSTILE, 0.8f, 0.6f), Sound.Emitter.self());
+            return true;
+        }
+
+        // Das Grinsen erscheint
+        this.challengeTimers.remove(player.getUuid());
+        Smiler duelSmiler = new Smiler(runtime);
+        duelSmiler.setBoundPlayer(player);
+        duelSmiler.spawnAtCell(game, room);
+        runtime.getMonsters().add(duelSmiler);
+        this.challengeSmilers.put(player.getUuid(), duelSmiler);
+        Jumpscare.visual(player, game);
+        return true;
+    }
+
+    /** Gemischte 3er-Meute wenige Zellen hinter dem Spieler. */
+    private void spawnPackBehind(BackroomsGame game, LevelRuntime runtime, Player player) {
+        LevelLayout layout = runtime.getLayout();
+        int playerCx = layout.cellX(player.getPosition().x());
+        int playerCz = layout.cellZ(player.getPosition().z());
+
+        int spawned = 0;
+        List<int[]> used = new ArrayList<>();
+        for(int attempt = 0; attempt < 12 && spawned < 3; attempt++) {
+            // Wer noch am Korridoranfang steht, hat kein "Hinten" — dann spawnt die
+            // Meute in der ersten begehbaren Spalte direkt hinter bzw. neben ihm
+            int cx = Math.max(1, playerCx - 2 - runtime.getRnd().nextInt(4));
+            int cz = playerCz + runtime.getRnd().nextInt(5) - 2;
+            if(!layout.isWalkable(cx, cz)) continue;
+            // jede Meute verteilt auf unterschiedliche Zellen
+            int finalCx = cx;
+            int finalCz = cz;
+            if(used.stream().anyMatch(cell -> cell[0] == finalCx && cell[1] == finalCz)) continue;
+            used.add(new int[]{cx, cz});
+
+            BackroomsMonster monster = switch(runtime.getRnd().nextInt(5)) {
+                case 0 -> new Partygoer(runtime);
+                case 1 -> new Wretch(runtime);
+                case 2 -> new Deathmoth(runtime);
+                default -> new Hound(runtime);
+            };
+            monster.setRoaming(true);
+            monster.setRelentless(true);
+            monster.setBoundPlayer(player);
+            monster.spawnAtCell(game, new int[]{cx, cz});
+            runtime.getMonsters().add(monster);
+            spawned++;
+        }
+    }
+
+    @Override
+    public AmbienceProfile ambience() {
+        return new AmbienceProfile(
+            SoundEvent.ENTITY_WARDEN_HEARTBEAT,
+            0.6f,
+            1f,
+            4,
+            List.of(SoundEvent.ENTITY_WARDEN_NEARBY_CLOSE, SoundEvent.ENTITY_GHAST_SCREAM),
+            0.05
+        );
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/level/impl/LevelFun.java

@@ -0,0 +1,109 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.impl;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.BackroomsGame;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.ambience.AmbienceProfile;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelDefinition;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelLayout;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelPalette;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelType;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.TransitionType;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.BackroomsMonster;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Partygoer;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.sound.SoundEvent;
+
+import java.util.List;
+import java.util.Random;
+
+/**
+ * Level Fun "=)": eine endlose Kinderparty in grellen Farben, mit kaputter
+ * Partymusik aus der Deckenanlage. Die Partygoer streifen in Rudeln umher
+ * und wollen, dass man FUER IMMER bleibt.
+ */
+public class LevelFun extends LevelDefinition {
+    private static final LevelPalette PALETTE = new LevelPalette(
+        List.of(Block.LIGHT_BLUE_WOOL, Block.CYAN_WOOL),
+        List.of(Block.ORANGE_CONCRETE, Block.ORANGE_TERRACOTTA, Block.YELLOW_CONCRETE),
+        List.of(Block.WHITE_CONCRETE),
+        Block.GLOWSTONE,
+        Block.MAGENTA_CONCRETE,
+        4,
+        Block.LIME_CONCRETE,
+        true,
+        List.of(Block.CAKE),
+        0.012,
+        List.of(),
+        0
+    );
+
+    @Override
+    public LevelType type() {
+        return LevelType.FUN;
+    }
+
+    @Override
+    public LevelLayout buildLayout(Random rnd, int cells, int playerCount) {
+        return this.standardLayout(rnd, cells, playerCount, 0.7, cells / 2, 7, 3);
+    }
+
+    @Override
+    public LevelPalette palette() {
+        return PALETTE;
+    }
+
+    @Override
+    public TransitionType transitionType() {
+        return TransitionType.GLITCH_FLOOR;
+    }
+
+    @Override
+    public boolean usesKeyDoor() {
+        return true;
+    }
+
+    /** Partygoer treten in Rudeln von 3-4 auf, jedes Rudel gemeinsam an einer Zelle. */
+    @Override
+    public void populateMonsters(BackroomsGame game, LevelRuntime runtime, int density) {
+        Random rnd = runtime.getRnd();
+        LevelLayout layout = runtime.getLayout();
+        for(int[] cell : Cells.farWalkable(layout, rnd, density * Cells.areaScale(layout))) {
+            int packSize = 3 + rnd.nextInt(2);
+            for(int i = 0; i < packSize; i++) {
+                // Rudel bleibt zusammen, aber jedes Mitglied auf einer eigenen Nachbarzelle
+                int cx = cell[0];
+                int cz = cell[1];
+                for(int attempt = 0; attempt < 6; attempt++) {
+                    int nx = cell[0] + rnd.nextInt(3) - 1;
+                    int nz = cell[1] + rnd.nextInt(3) - 1;
+                    if(layout.isWalkable(nx, nz)) {
+                        cx = nx;
+                        cz = nz;
+                        break;
+                    }
+                }
+                Partygoer partygoer = new Partygoer(runtime);
+                partygoer.spawnAtCell(game, new int[]{cx, cz});
+                runtime.getMonsters().add(partygoer);
+            }
+        }
+    }
+
+    /** "You can never catch a Partygoer alone" — der Nachschub kommt zu den Rudeln dazu. */
+    @Override
+    public BackroomsMonster createRoamingMonster(LevelRuntime runtime, int[] cell) {
+        return new Partygoer(runtime);
+    }
+
+    @Override
+    public AmbienceProfile ambience() {
+        return new AmbienceProfile(
+            SoundEvent.BLOCK_NOTE_BLOCK_BIT,
+            0.6f,
+            1.4f,
+            6,
+            List.of(SoundEvent.ENTITY_VILLAGER_CELEBRATE, SoundEvent.ENTITY_FIREWORK_ROCKET_LAUNCH, SoundEvent.BLOCK_CAKE_ADD_CANDLE),
+            0.04
+        );
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/level/impl/LevelHabitableZone.java

@@ -0,0 +1,146 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.impl;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.BackroomsGame;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.ambience.AmbienceProfile;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelDefinition;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelLayout;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelPalette;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelType;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.TransitionType;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Bacteria;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.BackroomsMonster;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Hound;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Wretch;
+import net.kyori.adventure.sound.Sound;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.sound.SoundEvent;
+
+import java.util.List;
+import java.util.Random;
+
+/**
+ * Level 1 "Habitable Zone": Parkhaus-/Lagerhallen-Atmosphaere aus grauem Beton.
+ * Grosse offene Flaechen mit regelmaessigen Stuetzpfeilern und vereinzelten
+ * Wasserpfuetzen. Event "The Flickering": kurze, zufaellige Komplett-Blackouts.
+ */
+public class LevelHabitableZone extends LevelDefinition {
+    private int blackoutSecondsLeft = 0;
+    private static final double FLICKERING_CHANCE_PER_SECOND = 1.0 / 60.0;
+    private static final double PUDDLE_CHANCE = 0.02;
+
+    private static final LevelPalette PALETTE = new LevelPalette(
+        List.of(Block.GRAY_CONCRETE, Block.STONE, Block.ANDESITE),
+        List.of(Block.STONE_BRICKS, Block.GRAY_CONCRETE, Block.CRACKED_STONE_BRICKS),
+        List.of(Block.GRAY_CONCRETE, Block.STONE),
+        Block.SEA_LANTERN,
+        Block.POLISHED_ANDESITE,
+        5,
+        Block.POLISHED_ANDESITE,
+        false,
+        List.of(Block.COBWEB),
+        0.006,
+        List.of(Block.IRON_CHAIN),
+        0.015
+    );
+
+    @Override
+    public LevelType type() {
+        return LevelType.HABITABLE_ZONE;
+    }
+
+    @Override
+    public LevelLayout buildLayout(Random rnd, int cells, int playerCount) {
+        LevelLayout layout = this.openLayout(rnd, cells, playerCount, cells / 2, 2);
+
+        // Stuetzpfeiler im 4er-Raster, nur mitten in Freiflaechen (Zelle + alle 4 Nachbarn frei)
+        for(int x = 2; x < cells - 2; x += 4) {
+            for(int z = 2; z < cells - 2; z += 4) {
+                if(layout.cellAt(x, z) != LevelLayout.Cell.FLOOR) continue;
+                if(layout.cellAt(x + 1, z) != LevelLayout.Cell.FLOOR) continue;
+                if(layout.cellAt(x - 1, z) != LevelLayout.Cell.FLOOR) continue;
+                if(layout.cellAt(x, z + 1) != LevelLayout.Cell.FLOOR) continue;
+                if(layout.cellAt(x, z - 1) != LevelLayout.Cell.FLOOR) continue;
+                if(Cells.reserved(layout, x, z)) continue;
+                layout.setCell(x, z, LevelLayout.Cell.PILLAR);
+                Cells.removeLight(layout, x, z);
+            }
+        }
+
+        // Vereinzelte Wasserpfuetzen auf dem Hallenboden
+        for(int x = 1; x < cells - 1; x++) {
+            for(int z = 1; z < cells - 1; z++) {
+                if(layout.cellAt(x, z) != LevelLayout.Cell.FLOOR) continue;
+                if(Cells.reserved(layout, x, z)) continue;
+                if(rnd.nextDouble() < PUDDLE_CHANCE) layout.setCell(x, z, LevelLayout.Cell.WATER);
+            }
+        }
+
+        return layout;
+    }
+
+    @Override
+    public LevelPalette palette() {
+        return PALETTE;
+    }
+
+    @Override
+    public TransitionType transitionType() {
+        return TransitionType.LADDER;
+    }
+
+    @Override
+    public void populateMonsters(BackroomsGame game, LevelRuntime runtime, int density) {
+        for(int[] cell : Cells.farWalkable(runtime.getLayout(), runtime.getRnd(), (1 + density) * Cells.areaScale(runtime.getLayout()))) {
+            Hound hound = new Hound(runtime);
+            hound.spawnAtCell(game, cell);
+            runtime.getMonsters().add(hound);
+        }
+        // Getarnte Bacteria zwischen den Betonpfeilern
+        for(int[] cell : Cells.farWalkable(runtime.getLayout(), runtime.getRnd(), density)) {
+            Bacteria bacteria = new Bacteria(runtime);
+            bacteria.spawnAtCell(game, cell);
+            runtime.getMonsters().add(bacteria);
+        }
+    }
+
+    /** Nachschub: meist Hounds, dazu Wretches und getarnte Bacteria. */
+    @Override
+    public BackroomsMonster createRoamingMonster(LevelRuntime runtime, int[] cell) {
+        int roll = runtime.getRnd().nextInt(100);
+        if(roll < 60) return new Hound(runtime);
+        if(roll < 85) return new Wretch(runtime);
+        return new Bacteria(runtime);
+    }
+
+    /** "The Flickering": zufaellig faellt fuer wenige Sekunden das komplette Licht aus. */
+    @Override
+    public void onLevelTick(BackroomsGame game, LevelRuntime runtime) {
+        Random rnd = runtime.getRnd();
+        if(!runtime.isBlackoutActive()) {
+            if(rnd.nextDouble() >= FLICKERING_CHANCE_PER_SECOND) return;
+            runtime.setBlackoutActive(true);
+            this.blackoutSecondsLeft = 5 + rnd.nextInt(4);
+            runtime.playersInLevel().forEach(player -> {
+                player.playSound(Sound.sound(SoundEvent.BLOCK_REDSTONE_TORCH_BURNOUT, Sound.Source.AMBIENT, 1f, 0.7f), Sound.Emitter.self());
+                player.playSound(Sound.sound(SoundEvent.BLOCK_LEVER_CLICK, Sound.Source.AMBIENT, 0.8f, 0.5f), Sound.Emitter.self());
+            });
+            return;
+        }
+
+        this.blackoutSecondsLeft--;
+        if(this.blackoutSecondsLeft <= 0) runtime.setBlackoutActive(false);
+    }
+
+    @Override
+    public AmbienceProfile ambience() {
+        return new AmbienceProfile(
+            SoundEvent.AMBIENT_BASALT_DELTAS_LOOP,
+            0.2f,
+            0.6f,
+            12,
+            List.of(SoundEvent.BLOCK_POINTED_DRIPSTONE_DRIP_WATER, SoundEvent.BLOCK_IRON_DOOR_CLOSE),
+            0.02
+        );
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/level/impl/LevelLightsOut.java

@@ -0,0 +1,110 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.impl;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.BackroomsGame;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.ambience.AmbienceProfile;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelDefinition;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelLayout;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelPalette;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelType;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.TransitionType;
+import net.kyori.adventure.sound.Sound;
+import net.minestom.server.coordinate.Pos;
+import net.minestom.server.entity.Player;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.sound.SoundEvent;
+
+import java.util.List;
+import java.util.Random;
+
+/**
+ * Level 6 "Lights Out": absolute Dunkelheit, keine einzige Lichtquelle, keine Monster —
+ * Level 6 ist gefaehrlich, weil NICHTS da ist. Navigation nur ueber einen periodischen
+ * Audio-Ping, der von der Exit-Position ausgeht.
+ */
+public class LevelLightsOut extends LevelDefinition {
+    private int pingSeconds = 0;
+    private static final int PING_PERIOD_SECONDS = 4;
+    private static final double HEARTBEAT_CHANCE = 0.25;
+
+    private static final LevelPalette PALETTE = new LevelPalette(
+        List.of(Block.SMOOTH_BASALT, Block.BLACK_CONCRETE, Block.SCULK),
+        List.of(Block.POLISHED_BLACKSTONE, Block.SMOOTH_BASALT),
+        List.of(Block.SMOOTH_BASALT),
+        Block.SEA_LANTERN,
+        Block.POLISHED_BLACKSTONE,
+        3,
+        Block.SCULK,
+        false,
+        List.of(Block.SCULK_SENSOR, Block.SCULK_SENSOR, Block.SCULK_CATALYST),
+        0.012,
+        List.of(),
+        0
+    );
+
+    @Override
+    public LevelType type() {
+        return LevelType.LIGHTS_OUT;
+    }
+
+    @Override
+    public LevelLayout buildLayout(Random rnd, int cells, int playerCount) {
+        LevelLayout layout = this.standardLayout(rnd, cells, playerCount, 0.25, cells / 4, 4, 1);
+
+        // Das gesamte Level liegt in Dunkelheit; saemtliche Deckenlichter entfallen
+        for(int x = 0; x < cells; x++) {
+            for(int z = 0; z < cells; z++) {
+                layout.setDark(x, z, true);
+            }
+        }
+        layout.getLightCells().clear();
+
+        return layout;
+    }
+
+    @Override
+    public boolean permanentDarkness() {
+        return true;
+    }
+
+    @Override
+    public LevelPalette palette() {
+        return PALETTE;
+    }
+
+    @Override
+    public TransitionType transitionType() {
+        return TransitionType.HOLE;
+    }
+
+    /** Audio-Navigation: alle 4 s ein positionsgebundener Shriek vom Exit aus. */
+    @Override
+    public void onLevelTick(BackroomsGame game, LevelRuntime runtime) {
+        this.pingSeconds++;
+        if(this.pingSeconds % PING_PERIOD_SECONDS != 0) return;
+
+        Pos exit = runtime.toPlayerPos(runtime.getLayout().getExitCell());
+        boolean heartbeat = runtime.getRnd().nextDouble() < HEARTBEAT_CHANCE;
+        for(Player player : runtime.playersInLevel()) {
+            player.playSound(
+                Sound.sound(SoundEvent.BLOCK_SCULK_SHRIEKER_SHRIEK, Sound.Source.AMBIENT, 1.5f, 1f),
+                exit.x(), exit.y(), exit.z()
+            );
+            if(heartbeat) {
+                player.playSound(Sound.sound(SoundEvent.ENTITY_WARDEN_HEARTBEAT, Sound.Source.AMBIENT, 0.3f, 0.9f), Sound.Emitter.self());
+            }
+        }
+    }
+
+    @Override
+    public AmbienceProfile ambience() {
+        return new AmbienceProfile(
+            SoundEvent.AMBIENT_CAVE,
+            0.4f,
+            0.7f,
+            20,
+            List.of(SoundEvent.BLOCK_SCULK_SENSOR_CLICKING, SoundEvent.ENTITY_WARDEN_NEARBY_CLOSE),
+            0.04
+        );
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/level/impl/LevelPipeDreams.java

@@ -0,0 +1,206 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.impl;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.BackroomsGame;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.ambience.AmbienceProfile;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.generator.MazeAlgorithms;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelDefinition;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelLayout;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelPalette;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelType;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.TransitionType;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.BackroomsMonster;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Clump;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Deathmoth;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Hound;
+import net.kyori.adventure.sound.Sound;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.sound.SoundEvent;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
+import java.util.Random;
+
+/**
+ * Level 2 "Pipe Dreams": enge, niedrige Industrietunnel voller Rohre und Maschinen.
+ * Fast reines Labyrinth mit verstreuten Maschinenbloecken. Event "Serienschaltung":
+ * regelmaessig faellt ein zusammenhaengendes Drittel der Deckenbeleuchtung aus.
+ */
+public class LevelPipeDreams extends LevelDefinition {
+    private static final double MACHINE_RATIO = 0.03;
+
+    /** aktuell ausgefallenes Licht-Segment (-1 = keins) und Restdauer */
+    private int failedSegment = -1;
+    private int eventSeconds = 0;
+    private static final int LIGHT_FAIL_PERIOD_SECONDS = 45;
+    private static final int LIGHT_FAIL_DURATION_SECONDS = 8;
+
+    private static final LevelPalette PALETTE = new LevelPalette(
+        List.of(Block.MUD_BRICKS, Block.PACKED_MUD),
+        List.of(Block.MUD_BRICKS, Block.DEEPSLATE_BRICKS, Block.BROWN_TERRACOTTA),
+        List.of(Block.DEEPSLATE_TILES),
+        Block.SHROOMLIGHT,
+        Block.OXIDIZED_COPPER,
+        3,
+        Block.EXPOSED_COPPER,
+        false,
+        List.of(Block.COBWEB, Block.IRON_BARS),
+        0.01,
+        List.of(Block.OXIDIZED_COPPER_CHAIN, Block.LANTERN.withProperty("hanging", "true")),
+        0.02
+    );
+
+    @Override
+    public LevelType type() {
+        return LevelType.PIPE_DREAMS;
+    }
+
+    @Override
+    public LevelLayout buildLayout(Random rnd, int cells, int playerCount) {
+        LevelLayout layout = this.standardLayout(rnd, cells, playerCount, 0.1, 2, 3, 2);
+
+        // "Maschinen": verstreute PILLAR-Zellen, aber nur wenn sie keine Wege abschneiden
+        List<int[]> floorCells = new ArrayList<>();
+        for(int x = 1; x < cells - 1; x++) {
+            for(int z = 1; z < cells - 1; z++) {
+                if(layout.cellAt(x, z) != LevelLayout.Cell.FLOOR || Cells.reserved(layout, x, z)) continue;
+                // Nie vor der Schluesseltuer oder an der Exit-Kammer: die DOOR-Zelle ist nicht
+                // begehbar, der disconnects-Check wuerde eine Blockade dort nicht bemerken
+                if(MazeAlgorithms.isChamberProtected(layout, x, z)) continue;
+                if(this.nextToDoor(layout, x, z)) continue;
+                floorCells.add(new int[]{x, z});
+            }
+        }
+        Collections.shuffle(floorCells, rnd);
+        int target = (int) Math.round(floorCells.size() * MACHINE_RATIO);
+        int placed = 0;
+        for(int[] cell : floorCells) {
+            if(placed >= target) break;
+            layout.setCell(cell[0], cell[1], LevelLayout.Cell.PILLAR);
+            if(this.disconnects(layout)) {
+                layout.setCell(cell[0], cell[1], LevelLayout.Cell.FLOOR);
+                continue;
+            }
+            Cells.removeLight(layout, cell[0], cell[1]);
+            placed++;
+        }
+
+        return layout;
+    }
+
+    private boolean nextToDoor(LevelLayout layout, int cx, int cz) {
+        return layout.cellAt(cx + 1, cz) == LevelLayout.Cell.DOOR
+            || layout.cellAt(cx - 1, cz) == LevelLayout.Cell.DOOR
+            || layout.cellAt(cx, cz + 1) == LevelLayout.Cell.DOOR
+            || layout.cellAt(cx, cz - 1) == LevelLayout.Cell.DOOR;
+    }
+
+    /** Prueft per BFS, ob alle begehbaren Zellen (ausser der abgeschlossenen Exit-Kammer) verbunden bleiben. */
+    private boolean disconnects(LevelLayout layout) {
+        int[][] distances = MazeAlgorithms.bfsDistances(layout, layout.getSpawnCells().getFirst());
+        for(int x = 0; x < layout.getCells(); x++) {
+            for(int z = 0; z < layout.getCells(); z++) {
+                if(!layout.isWalkable(x, z)) continue;
+                if(layout.cellAt(x, z) == LevelLayout.Cell.EXIT) continue;
+                if(distances[x][z] < 0) return true;
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public LevelPalette palette() {
+        return PALETTE;
+    }
+
+    @Override
+    public TransitionType transitionType() {
+        return TransitionType.GLITCH_FLOOR;
+    }
+
+    @Override
+    public boolean usesKeyDoor() {
+        return true;
+    }
+
+    @Override
+    public void populateMonsters(BackroomsGame game, LevelRuntime runtime, int density) {
+        LevelLayout layout = runtime.getLayout();
+
+        // Clumps lauern an Ecken (genau zwei orthogonal offene Richtungen)
+        List<int[]> corners = Cells.far(layout, runtime.getRnd(), (2 + density) * Cells.areaScale(layout), (x, z) -> Cells.openOrthogonal(layout, x, z) == 2);
+        for(int[] cell : corners) {
+            Clump clump = new Clump(runtime);
+            clump.spawnAtCell(game, cell);
+            runtime.getMonsters().add(clump);
+        }
+
+        // Hounds meiden die Clump-Zellen — sonst stapeln sich beide Populationen
+        for(int[] cell : Cells.far(layout, runtime.getRnd(), density * Cells.areaScale(layout),
+            (x, z) -> corners.stream().noneMatch(corner -> Math.abs(corner[0] - x) + Math.abs(corner[1] - z) < 4))) {
+            Hound hound = new Hound(runtime);
+            hound.spawnAtCell(game, cell);
+            runtime.getMonsters().add(hound);
+        }
+    }
+
+    /** Nachschub: Clumps an Ecken, sonst Hounds. */
+    @Override
+    public BackroomsMonster createRoamingMonster(LevelRuntime runtime, int[] cell) {
+        LevelLayout layout = runtime.getLayout();
+        if(Cells.openOrthogonal(layout, cell[0], cell[1]) == 2) return new Clump(runtime);
+        return runtime.getRnd().nextInt(100) < 60 ? new Hound(runtime) : new Deathmoth(runtime);
+    }
+
+    /** "Serienschaltung": ca. alle 45 s faellt ein Drittel der Lichter fuer ~8 s aus. */
+    @Override
+    public void onLevelTick(BackroomsGame game, LevelRuntime runtime) {
+        if(this.failedSegment < 0) {
+            this.eventSeconds++;
+            if(this.eventSeconds < LIGHT_FAIL_PERIOD_SECONDS) return;
+
+            int segment = runtime.getRnd().nextInt(3);
+            this.failedSegment = segment;
+            this.eventSeconds = LIGHT_FAIL_DURATION_SECONDS;
+            this.setSegmentLights(game, runtime, segment, Block.DEEPSLATE_TILES);
+            runtime.playersInLevel().forEach(player ->
+                player.playSound(Sound.sound(SoundEvent.BLOCK_REDSTONE_TORCH_BURNOUT, Sound.Source.AMBIENT, 1f, 0.6f), Sound.Emitter.self()));
+            return;
+        }
+
+        this.eventSeconds--;
+        if(this.eventSeconds > 0) return;
+        this.setSegmentLights(game, runtime, this.failedSegment, PALETTE.light());
+        this.failedSegment = -1;
+        this.eventSeconds = 0;
+    }
+
+    /** Setzt die Deckenbloecke eines nach x sortierten Drittels aller Lichtzellen. */
+    private void setSegmentLights(BackroomsGame game, LevelRuntime runtime, int segment, Block block) {
+        LevelLayout layout = runtime.getLayout();
+        List<int[]> lights = new ArrayList<>(layout.getLightCells());
+        lights.sort(Comparator.comparingInt(cell -> cell[0]));
+
+        int from = segment * lights.size() / 3;
+        int to = segment == 2 ? lights.size() : (segment + 1) * lights.size() / 3;
+        int ceilingY = runtime.getBaseY() + 2 + PALETTE.roomHeight();
+        for(int i = from; i < to; i++) {
+            int[] cell = lights.get(i);
+            game.setBlock(layout.worldX(cell[0]) + 1, ceilingY, layout.worldZ(cell[1]) + 1, block);
+        }
+    }
+
+    @Override
+    public AmbienceProfile ambience() {
+        return new AmbienceProfile(
+            SoundEvent.AMBIENT_NETHER_WASTES_LOOP,
+            0.25f,
+            0.5f,
+            15,
+            List.of(SoundEvent.BLOCK_ANVIL_LAND, SoundEvent.BLOCK_LAVA_POP),
+            0.02
+        );
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/level/impl/LevelPoolrooms.java

@@ -0,0 +1,182 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.impl;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.BackroomsGame;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.ambience.AmbienceProfile;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelDefinition;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelLayout;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelPalette;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelType;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.TransitionType;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.generator.MazeAlgorithms;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.BackroomsMonster;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Hound;
+import net.kyori.adventure.sound.Sound;
+import net.minestom.server.coordinate.Pos;
+import net.minestom.server.entity.Player;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.network.packet.server.play.ParticlePacket;
+import net.minestom.server.particle.Particle;
+import net.minestom.server.sound.SoundEvent;
+
+import java.util.List;
+import java.util.Random;
+
+/**
+ * "The Poolrooms": halb geflutete, weisse Fliesenhallen mit hohen Decken und
+ * grossen Wasserbecken — die Verschnaufpause zwischen den gefaehrlichen Ebenen.
+ * Ausgang: ein Abfluss (Loch) am Beckengrund.
+ */
+public class LevelPoolrooms extends LevelDefinition {
+    private static final LevelPalette PALETTE = new LevelPalette(
+        List.of(Block.QUARTZ_BLOCK, Block.WHITE_CONCRETE),
+        List.of(Block.QUARTZ_BLOCK, Block.WHITE_GLAZED_TERRACOTTA, Block.WHITE_CONCRETE),
+        List.of(Block.SMOOTH_QUARTZ),
+        Block.SEA_LANTERN,
+        Block.QUARTZ_PILLAR,
+        6,
+        Block.WHITE_GLAZED_TERRACOTTA,
+        true,
+        List.of(),
+        0,
+        List.of(),
+        0
+    );
+
+    @Override
+    public LevelType type() {
+        return LevelType.POOLROOMS;
+    }
+
+    @Override
+    public LevelLayout buildLayout(Random rnd, int cells, int playerCount) {
+        LevelLayout layout = this.openLayout(rnd, cells, playerCount, cells / 4, 2);
+
+        // 3-5 grosse rechteckige Wasserbecken; das erste ist doppelt tief
+        int pools = 3 + rnd.nextInt(3);
+        for(int i = 0; i < pools; i++) {
+            int width = 4 + rnd.nextInt(5);
+            int depth = 4 + rnd.nextInt(5);
+            int startX = 1 + rnd.nextInt(Math.max(1, cells - width - 2));
+            int startZ = 1 + rnd.nextInt(Math.max(1, cells - depth - 2));
+            LevelLayout.Cell poolType = i == 0 ? LevelLayout.Cell.DEEP_WATER : LevelLayout.Cell.WATER;
+            for(int x = startX; x < startX + width; x++) {
+                for(int z = startZ; z < startZ + depth; z++) {
+                    if(layout.cellAt(x, z) != LevelLayout.Cell.FLOOR) continue;
+                    if(Cells.reserved(layout, x, z)) continue;
+                    layout.setCell(x, z, poolType);
+                }
+            }
+        }
+
+        // Kupfer-Leitungsstraenge unter der Decke, quer durch die Hallen — mit Undichtigkeiten
+        int ducts = 3 + rnd.nextInt(3);
+        for(int i = 0; i < ducts; i++) {
+            boolean alongX = rnd.nextBoolean();
+            int fixed = 3 + rnd.nextInt(cells - 6);
+            for(int j = 2; j < cells - 2; j++) {
+                int x = alongX ? j : fixed;
+                int z = alongX ? fixed : j;
+                if(layout.cellAt(x, z) != LevelLayout.Cell.FLOOR) continue;
+                if(Cells.reserved(layout, x, z)) continue;
+                if(MazeAlgorithms.isChamberProtected(layout, x, z)) continue;
+                // ~8% der Leitungszellen sind undicht — dort laeuft das Wasser heraus
+                layout.setCell(x, z, rnd.nextInt(100) < 8 ? LevelLayout.Cell.LEAK : LevelLayout.Cell.PIPE);
+            }
+        }
+        layout.getLightCells().removeIf(cell -> {
+            LevelLayout.Cell type = layout.cellAt(cell[0], cell[1]);
+            return type == LevelLayout.Cell.PIPE || type == LevelLayout.Cell.LEAK;
+        });
+
+        // Abfluss: Wasser stroemt ringfoermig auf das Exit-Loch zu — die Rutsche nach unten
+        int[] exit = layout.getExitCell();
+        if(exit != null) {
+            for(int dx = -1; dx <= 1; dx++) {
+                for(int dz = -1; dz <= 1; dz++) {
+                    if(dx == 0 && dz == 0) continue;
+                    if(layout.cellAt(exit[0] + dx, exit[1] + dz) != LevelLayout.Cell.FLOOR) continue;
+                    layout.setCell(exit[0] + dx, exit[1] + dz, LevelLayout.Cell.WATER);
+                }
+            }
+        }
+
+        // Dampf-Ventile: an zufaelligen Leitungs- und Beckenraendern zischt es
+        for(int i = 0; i < cells / 5; i++) {
+            int x = 2 + rnd.nextInt(cells - 4);
+            int z = 2 + rnd.nextInt(cells - 4);
+            LevelLayout.Cell type = layout.cellAt(x, z);
+            if(type == LevelLayout.Cell.PIPE || type == LevelLayout.Cell.LEAK || type == LevelLayout.Cell.WATER) {
+                layout.getMarkerCells().add(new int[]{x, z});
+            }
+        }
+
+        // 1-2 kleine dunkle Ecken
+        Cells.darkBlobs(layout, rnd, 1 + rnd.nextInt(2), 2, 3);
+
+        return layout;
+    }
+
+    @Override
+    public LevelPalette palette() {
+        return PALETTE;
+    }
+
+    @Override
+    public TransitionType transitionType() {
+        return TransitionType.HOLE;
+    }
+
+    /** Dampf-Ventile: Wolkenpartikel + Zischen an den Markern in Spielernaehe. */
+    @Override
+    public void onLevelTick(BackroomsGame game, LevelRuntime runtime) {
+        LevelLayout layout = runtime.getLayout();
+        List<Player> players = runtime.playersInLevel();
+        for(int[] vent : layout.getMarkerCells()) {
+            Pos ventPos = runtime.toPlayerPos(vent);
+            for(Player player : players) {
+                if(player.getPosition().distance(ventPos) > 28) continue;
+                player.sendPacket(new ParticlePacket(
+                    Particle.CLOUD,
+                    ventPos.x(), ventPos.y() + 2.5, ventPos.z(),
+                    0.3f, 0.6f, 0.3f, 0.02f, 6
+                ));
+                if(runtime.getRnd().nextInt(100) < 12) {
+                    player.playSound(
+                        Sound.sound(SoundEvent.BLOCK_LAVA_EXTINGUISH, Sound.Source.AMBIENT, 0.4f, 1.6f),
+                        ventPos.x(), ventPos.y(), ventPos.z()
+                    );
+                }
+            }
+        }
+    }
+
+    /** Die Poolrooms sind bewusst fast leer — erst bei maximaler Dichte streift ein Hound umher. */
+    @Override
+    public void populateMonsters(BackroomsGame game, LevelRuntime runtime, int density) {
+        if(density < 3) return;
+        for(int[] cell : Cells.farWalkable(runtime.getLayout(), runtime.getRnd(), 1)) {
+            Hound hound = new Hound(runtime);
+            hound.spawnAtCell(game, cell);
+            runtime.getMonsters().add(hound);
+        }
+    }
+
+    /** Die Poolrooms bleiben ueberwiegend friedlich — nur selten verirrt sich ein Hound hierher. */
+    @Override
+    public BackroomsMonster createRoamingMonster(LevelRuntime runtime, int[] cell) {
+        return runtime.getRnd().nextInt(100) < 20 ? new Hound(runtime) : null;
+    }
+
+    @Override
+    public AmbienceProfile ambience() {
+        return new AmbienceProfile(
+            SoundEvent.AMBIENT_UNDERWATER_LOOP,
+            0.3f,
+            1f,
+            10,
+            List.of(SoundEvent.BLOCK_POINTED_DRIPSTONE_DRIP_WATER, SoundEvent.ENTITY_DOLPHIN_AMBIENT_WATER),
+            0.03
+        );
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/loot/ChestManager.java

@@ -0,0 +1,199 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.loot;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.BackroomsGame;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.ambience.Jumpscare;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.item.BackroomsItems;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelLayout;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import net.kyori.adventure.sound.Sound;
+import net.minestom.server.coordinate.BlockVec;
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.coordinate.Pos;
+import net.minestom.server.network.packet.server.play.BlockChangePacket;
+import net.minestom.server.entity.Player;
+import net.minestom.server.event.player.PlayerBlockInteractEvent;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.item.ItemStack;
+import net.minestom.server.sound.SoundEvent;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.UUID;
+
+/**
+ * Loot-Kisten (Barrels):
+ * - Normale Kisten sind einmal pluenderbar und verschwinden. Der Loot haengt vom
+ *   Inventar ab — wer schon viel Almond Water traegt, findet kaum noch welches;
+ *   wer generell voll ist, findet hoechstens noch den Schluessel.
+ * - In Key-Door-Leveln kann JEDE Kiste mit etwas Glueck den Level Key enthalten
+ *   (solange die Tuer zu ist und der Spieler noch keinen hat); die dedizierte
+ *   Schluessel-Kiste gibt ihn jedem Spieler garantiert einmal.
+ */
+public class ChestManager {
+    private static final int RANDOM_KEY_CHANCE_PERCENT = 10;
+    private static final int RANDOM_COMPASS_CHANCE_PERCENT = 10;
+
+    private final BackroomsGame game;
+    private final Map<Point, Integer> chestLevels = new HashMap<>();
+    private final Map<Point, Integer> keyChestLevels = new HashMap<>();
+    private final Map<Point, Set<UUID>> keyChestLooters = new HashMap<>();
+    private final Map<Point, Set<UUID>> chestLooters = new HashMap<>();
+
+    public ChestManager(BackroomsGame game) {
+        this.game = game;
+
+        for(LevelRuntime level : game.getLevels()) {
+            int chestY = level.getBaseY() + 2;
+            level.getLayout().getChestCells().forEach(cell ->
+                this.chestLevels.put(this.blockPos(level, cell, chestY), level.getIndex())
+            );
+            if(level.getLayout().getKeyChestCell() != null) {
+                this.keyChestLevels.put(this.blockPos(level, level.getLayout().getKeyChestCell(), chestY), level.getIndex());
+            }
+        }
+    }
+
+    private Point blockPos(LevelRuntime level, int[] cell, int y) {
+        Pos center = level.toPlayerPos(cell);
+        return new Pos(center.blockX(), y, center.blockZ());
+    }
+
+    public void onInteract(PlayerBlockInteractEvent event) {
+        if(!event.getBlock().compare(Block.BARREL)) return;
+        Point position = new Pos(event.getBlockPosition().blockX(), event.getBlockPosition().blockY(), event.getBlockPosition().blockZ());
+        Player player = event.getPlayer();
+
+        Integer keyLevel = this.keyChestLevels.get(position);
+        if(keyLevel != null && !this.game.isDoorOpened(keyLevel)) {
+            event.setCancelled(true);
+            event.setBlockingItemUse(true);
+            Set<UUID> looters = this.keyChestLooters.computeIfAbsent(position, unused -> new HashSet<>());
+            if(!looters.add(player.getUuid())) {
+                player.playSound(Sound.sound(SoundEvent.BLOCK_CHEST_LOCKED, Sound.Source.BLOCK, 0.8f, 0.9f), position.x(), position.y(), position.z());
+                return;
+            }
+            this.giveKey(player, keyLevel);
+            player.playSound(Sound.sound(SoundEvent.BLOCK_BARREL_OPEN, Sound.Source.BLOCK, 1f, 0.8f), position.x(), position.y(), position.z());
+            this.hideChestFor(player, position);
+            return;
+        }
+
+        Integer chestLevel = keyLevel != null ? keyLevel : this.chestLevels.get(position);
+        if(chestLevel == null) return;
+
+        event.setCancelled(true);
+        event.setBlockingItemUse(true);
+
+        // Kisten sind per Spieler pluenderbar — niemand nimmt anderen den Loot weg
+        Set<UUID> looters = this.chestLooters.computeIfAbsent(position, unused -> new HashSet<>());
+        if(!looters.add(player.getUuid())) {
+            // Falls der Chunk neu gesendet wurde und der Barrel wieder aufgetaucht ist: erneut ausblenden
+            this.hideChestFor(player, position);
+            return;
+        }
+
+        List<ItemStack> loot = this.rollFor(player, chestLevel);
+        loot.forEach(item -> player.getInventory().addItemStack(item));
+
+        SoundEvent sound = loot.isEmpty() ? SoundEvent.BLOCK_BARREL_CLOSE : SoundEvent.BLOCK_BARREL_OPEN;
+        player.playSound(Sound.sound(sound, Sound.Source.BLOCK, 1f, 0.8f), position.x(), position.y(), position.z());
+        this.hideChestFor(player, position);
+
+        // Kisten sind ein guter Jumpscare-Anker: kleine Chance auf einen Sound-Scare
+        if(this.game.rnd().nextInt(100) < 20) {
+            Jumpscare.sound(player, this.game.rnd());
+        }
+    }
+
+    /**
+     * Blendet die gepluenderte Kiste NUR fuer diesen Spieler aus — der Serverblock
+     * bleibt, alle anderen sehen den Barrel weiter.
+     */
+    private void hideChestFor(Player player, Point position) {
+        player.sendPacket(new BlockChangePacket(new BlockVec(position.blockX(), position.blockY(), position.blockZ()), Block.AIR));
+    }
+
+    /**
+     * Inventarabhaengiger Loot. In Key-Door-Leveln sind Key (10 %) und Tuerkompass (10 %)
+     * getrennt voneinander findbar — beides maximal einmal pro Spieler.
+     */
+    private List<ItemStack> rollFor(Player player, int levelIndex) {
+        List<ItemStack> result = new ArrayList<>();
+
+        LevelRuntime level = this.game.getLevels().get(levelIndex);
+        boolean doorRelevant = level.getDefinition().usesKeyDoor() && !this.game.isDoorOpened(levelIndex);
+        if(doorRelevant && !BackroomsItems.hasMatching(player, item -> BackroomsItems.isKeyFor(item, levelIndex)) && this.game.rnd().nextInt(100) < RANDOM_KEY_CHANCE_PERCENT) {
+            result.add(BackroomsItems.levelKey(levelIndex));
+        }
+        if(doorRelevant && !this.hasCompassFor(player, levelIndex) && this.game.rnd().nextInt(100) < RANDOM_COMPASS_CHANCE_PERCENT) {
+            ItemStack compass = this.createCompass(levelIndex);
+            if(compass != null) result.add(compass);
+        }
+
+        int almond = BackroomsItems.count(player, BackroomsItems.ALMOND_WATER);
+        int energy = BackroomsItems.count(player, BackroomsItems.ENERGY_BAR);
+        int carried = almond + energy;
+
+        // Randvolles Inventar: die Backrooms geben dir nichts mehr — hoechstens Key/Kompass
+        if(carried >= 16) return result;
+
+        LootTable table = new LootTable();
+        int almondWeight = Math.max(0, 5 - almond);
+        int energyWeight = Math.max(1, 10 - energy);
+        if(almondWeight > 0) table.add(BackroomsItems::almondWater, almondWeight);
+        table.add(BackroomsItems::energyBar, energyWeight);
+        table.add(() -> ItemStack.AIR, 4);
+        result.addAll(table.roll(this.game.rnd()));
+
+        return result;
+    }
+
+    private void giveKey(Player player, int levelIndex) {
+        player.getInventory().addItemStack(BackroomsItems.levelKey(levelIndex));
+        player.getInventory().addItemStack(BackroomsItems.almondWater());
+    }
+
+    private ItemStack createCompass(int levelIndex) {
+        Point doorPosition = this.doorPositionOf(levelIndex);
+        if(doorPosition == null) return null;
+        return BackroomsItems.doorCompass(levelIndex, this.game.getDimensionName(), doorPosition);
+    }
+
+    /** Nach dem Tueroeffnen: alle Nachzuegler bekommen automatisch einen Kompass zur offenen Tuer. */
+    public void giveCompassIfMissing(Player player, int levelIndex) {
+        if(this.hasCompassFor(player, levelIndex)) return;
+        ItemStack compass = this.createCompass(levelIndex);
+        if(compass != null) player.getInventory().addItemStack(compass);
+    }
+
+
+    private Point doorPositionOf(int levelIndex) {
+        LevelRuntime level = this.game.getLevels().get(levelIndex);
+        LevelLayout layout = level.getLayout();
+        int[] door = layout.getDoorCell();
+        if(door != null) {
+            return new Pos(layout.worldX(door[0]) + 1, level.getBaseY() + 2, layout.worldZ(door[1]) + 1);
+        }
+        // Fallback (Finale-Seitentueren setzen kein doorCell): erste DOOR-Zelle suchen
+        for(int cx = 0; cx < layout.getCells(); cx++) {
+            for(int cz = 0; cz < layout.getCells(); cz++) {
+                if(layout.cellAt(cx, cz) == LevelLayout.Cell.DOOR) {
+                    return new Pos(layout.worldX(cx) + 1, level.getBaseY() + 2, layout.worldZ(cz) + 1);
+                }
+            }
+        }
+        return null;
+    }
+
+    private boolean hasCompassFor(Player player, int levelIndex) {
+        return BackroomsItems.hasMatching(player, item ->
+            BackroomsItems.is(item, BackroomsItems.DOOR_COMPASS)
+                && Integer.valueOf(levelIndex).equals(item.getTag(BackroomsItems.KEY_LEVEL_TAG)));
+    }
+
+
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/loot/LootTable.java

@@ -0,0 +1,43 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.loot;
+
+import net.minestom.server.item.ItemStack;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+import java.util.function.Supplier;
+
+/**
+ * Gewichtete Loot-Tabelle; eine Kiste liefert 1-2 Wuerfe.
+ */
+public class LootTable {
+    private record Entry(Supplier<ItemStack> item, int weight) {
+    }
+
+    private final List<Entry> entries = new ArrayList<>();
+    private int totalWeight = 0;
+
+    public LootTable add(Supplier<ItemStack> item, int weight) {
+        this.entries.add(new Entry(item, weight));
+        this.totalWeight += weight;
+        return this;
+    }
+
+    public List<ItemStack> roll(Random rnd) {
+        List<ItemStack> result = new ArrayList<>();
+        int rolls = 1 + rnd.nextInt(2);
+        for(int i = 0; i < rolls; i++) {
+            int roll = rnd.nextInt(this.totalWeight);
+            for(Entry entry : this.entries) {
+                roll -= entry.weight();
+                if(roll < 0) {
+                    ItemStack item = entry.item().get();
+                    if(!item.isAir()) result.add(item);
+                    break;
+                }
+            }
+        }
+        return result;
+    }
+
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/monster/BackroomsMonster.java

@@ -0,0 +1,207 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelLayout;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import net.kyori.adventure.sound.Sound;
+import net.minestom.server.MinecraftServer;
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.coordinate.Pos;
+import net.minestom.server.entity.EntityCreature;
+import net.minestom.server.entity.GameMode;
+import net.minestom.server.entity.EntityType;
+import net.minestom.server.entity.Player;
+import net.minestom.server.entity.attribute.Attribute;
+import net.minestom.server.entity.damage.DamageType;
+import net.minestom.server.instance.Chunk;
+import net.minestom.server.instance.Instance;
+import net.minestom.server.sound.SoundEvent;
+
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.List;
+import java.util.concurrent.CompletableFuture;
+import java.util.Optional;
+
+/**
+ * Basisklasse aller Backrooms-Monster: einfache Zustandsmaschine, Line-of-Sight- und
+ * Blickrichtungs-Helfer, Navigator-Pathing und Nahkampfangriff. Der zentrale AI-Tick
+ * des Spiels ruft {@link #monsterTick(long)} nur auf, solange Spieler im Level sind.
+ */
+public abstract class BackroomsMonster extends EntityCreature {
+    public enum State {IDLE, ALERT, CHASE, ATTACK, RETREAT}
+
+    protected final LevelRuntime level;
+    protected State state = State.IDLE;
+    protected long stateSince = 0;
+    protected Player target;
+
+    protected double viewRange = 16;
+    protected float attackDamage = 4;
+    protected double attackRange = 1.8;
+    protected int attackCooldownTicks = 20;
+    private long lastAttackTick = 0;
+
+    /** Vom Monster-Director in Spielernaehe gespawnt — darf bei Distanz wieder despawnen */
+    private boolean roaming = false;
+
+    /**
+     * Finale-Modus: unbegrenzte Verfolgungsreichweite und Gummiband-Tempo —
+     * je weiter das Ziel voraus ist, desto schneller wird das Monster.
+     */
+    private boolean relentless = false;
+
+    /**
+     * Fest gebundenes Ziel (persoenliche Finale-Meute): das Monster jagt NUR diesen
+     * Spieler und entfernt sich selbst, sobald er entkommt, stirbt oder geht.
+     */
+    private Player boundPlayer;
+
+    protected BackroomsMonster(EntityType entityType, LevelRuntime level) {
+        super(entityType);
+        this.level = level;
+    }
+
+    public abstract void monsterTick(long tick);
+
+
+    public boolean isRoaming() {
+        return this.roaming;
+    }
+
+    public void setRoaming(boolean roaming) {
+        this.roaming = roaming;
+    }
+
+    public void setRelentless(boolean relentless) {
+        this.relentless = relentless;
+    }
+
+    public void setBoundPlayer(Player boundPlayer) {
+        this.boundPlayer = boundPlayer;
+    }
+
+
+    protected void setState(State state, long tick) {
+        if(this.state == state) return;
+        this.state = state;
+        this.stateSince = tick;
+    }
+
+    public void spawnAtCell(Instance instance, int[] cell) {
+        Pos position = this.level.toPlayerPos(cell);
+        // Entity-Tracking ist 2D — ohne diese Regel wuerden Spieler die Monster
+        // aller vertikal gestapelten Level mitgesendet bekommen
+        this.updateViewableRule(viewer ->
+            Math.abs(viewer.getPosition().y() - this.getPosition().y()) < LevelRuntime.LEVEL_HEIGHT
+        );
+        // Chunks sind beim Spielstart meist noch nicht geladen — die 3x3-Nachbarschaft
+        // vorladen, damit Physik und Pathfinding des Monsters nicht ins Leere greifen
+        int chunkX = position.chunkX();
+        int chunkZ = position.chunkZ();
+        List<CompletableFuture<Chunk>> loads = new ArrayList<>();
+        for(int dx = -1; dx <= 1; dx++) {
+            for(int dz = -1; dz <= 1; dz++) {
+                loads.add(instance.loadChunk(chunkX + dx, chunkZ + dz));
+            }
+        }
+        CompletableFuture.allOf(loads.toArray(CompletableFuture[]::new))
+            .thenRun(() -> {
+                this.setInstance(instance, position);
+                MinecraftServer.getSchedulerManager().scheduleNextTick(() -> {
+                    if(!this.isRemoved()) this.onSpawned();
+                });
+            })
+            .exceptionally(throwable -> {
+                MinecraftServer.getExceptionManager().handleException(throwable);
+                return null;
+            });
+    }
+
+    /** Wird einen Tick nach dem Spawn aufgerufen (z. B. fuer Passagier-Displays). */
+    protected void onSpawned() {
+    }
+
+    /** Monster, die selbst in der Dunkelheit leben, verlieren dort keine Sichtweite */
+    protected boolean ignoresDarkness = false;
+
+    /** Sichtbarkeit inkl. Distanz; in Dunkelzonen sehen Monster nur halb so weit. */
+    protected boolean canSee(Player player) {
+        if(player.getGameMode() != GameMode.ADVENTURE) return false;
+        // Relentless-Verfolger verlieren ihr Ziel nie — egal wie weit es flieht
+        if(this.relentless) return true;
+        boolean darkPenalty = !this.ignoresDarkness && this.level.getLayout().isDarkAt(player.getPosition());
+        double range = darkPenalty ? this.viewRange / 2 : this.viewRange;
+        if(this.getDistance(player) > range) return false;
+        return this.hasLineOfSight(player);
+    }
+
+    protected Optional<Player> nearestVisiblePlayer() {
+        // Gebundene Monster kennen nur ihr eigenes Ziel
+        if(this.boundPlayer != null) {
+            boolean valid = !this.boundPlayer.isRemoved()
+                && this.boundPlayer.getGameMode() == GameMode.ADVENTURE
+                && this.level.playersInLevel().contains(this.boundPlayer);
+            if(!valid) {
+                this.remove();
+                return Optional.empty();
+            }
+            return Optional.of(this.boundPlayer).filter(this::canSee);
+        }
+
+        return this.level.playersInLevel().stream()
+            .filter(this::canSee)
+            .min(Comparator.comparingDouble(this::getDistance));
+    }
+
+    /** Schaut der Spieler dieses Monster direkt an? */
+    protected boolean playerLooksAtMe(Player player) {
+        Pos playerPos = player.getPosition();
+        var toMonster = this.getPosition().add(0, 1, 0).sub(playerPos.add(0, player.getEyeHeight(), 0)).asVec().normalize();
+        return playerPos.direction().dot(toMonster) > 0.92 && player.hasLineOfSight(this);
+    }
+
+    protected void moveTo(Point point, double speed) {
+        // Gummiband im Relentless-Modus: deutlich schneller, wenn das Ziel weit voraus ist
+        if(this.relentless) {
+            double distance = this.getPosition().distance(point);
+            speed += Math.clamp((distance - 20) * 0.008, 0, 0.18);
+        }
+        // Die Geschwindigkeit kommt ausschliesslich aus dem MOVEMENT_SPEED-Attribut —
+        // der double-Parameter von setPathTo ist die Zieldistanz, NICHT die Geschwindigkeit
+        this.getAttribute(Attribute.MOVEMENT_SPEED).setBaseValue(speed);
+        this.getNavigator().setPathTo(point);
+    }
+
+    /** Zufaellige begehbare Nachbarzelle als Wanderziel. */
+    protected void wander(double speed) {
+        LevelLayout layout = this.level.getLayout();
+        int cx = layout.cellX(this.getPosition().x());
+        int cz = layout.cellZ(this.getPosition().z());
+        for(int attempt = 0; attempt < 6; attempt++) {
+            int nx = cx + this.level.getRnd().nextInt(7) - 3;
+            int nz = cz + this.level.getRnd().nextInt(7) - 3;
+            if(!layout.isWalkable(nx, nz)) continue;
+            this.moveTo(this.level.toPlayerPos(new int[]{nx, nz}), speed);
+            return;
+        }
+    }
+
+    /** Nahkampfangriff mit Cooldown; true, wenn zugeschlagen wurde. */
+    protected boolean tryAttack(Player player, long tick) {
+        if(tick - this.lastAttackTick < this.attackCooldownTicks) return false;
+        if(this.getDistance(player) > this.attackRange) return false;
+        this.lastAttackTick = tick;
+        player.damage(DamageType.MOB_ATTACK, this.attackDamage);
+        var knockback = player.getPosition().sub(this.getPosition()).asVec().withY(0).normalize().mul(6).withY(4);
+        player.setVelocity(player.getVelocity().add(knockback));
+        return true;
+    }
+
+    /** Positionsgebundener Sound an alle Spieler des Levels. */
+    protected void emitSound(SoundEvent sound, float volume, float pitch) {
+        Pos position = this.getPosition();
+        this.level.playersInLevel().forEach(player ->
+            player.playSound(Sound.sound(sound, Sound.Source.HOSTILE, volume, pitch), position.x(), position.y(), position.z())
+        );
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/monster/Bacteria.java

@@ -0,0 +1,169 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import net.kyori.adventure.sound.Sound;
+import net.minestom.server.coordinate.Vec;
+import net.minestom.server.entity.Entity;
+import net.minestom.server.entity.EntityType;
+import net.minestom.server.entity.Player;
+import net.minestom.server.entity.attribute.Attribute;
+import net.minestom.server.entity.metadata.display.BlockDisplayMeta;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.sound.SoundEvent;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * The Bacteria (nach Kane Pixels): eine turmhohe, skelettartige Gestalt mit
+ * ueberlangen Gliedmassen in unnatuerlichen Winkeln. Im Stillstand traegt sie die
+ * Wandtextur des Levels und verschmilzt mit der Umgebung — erwacht sie, faerbt
+ * sich der Koerper schlagartig schwarz. Sie lockt Wanderer mit imitierten
+ * menschlichen Geraeuschen an und bricht dann in einen rasend schnellen Sprint aus.
+ * Schleichende Spieler nimmt sie kaum wahr.
+ */
+public class Bacteria extends BackroomsMonster {
+    /** Distanz, ab der ein normal gehender Spieler den Angriff ausloest */
+    private static final double TRIGGER_DISTANCE = 7;
+    /** Schleichende Spieler sind fast unsichtbar fuer ihn */
+    private static final double SNEAK_TRIGGER_DISTANCE = 3.5;
+    /** Lock-Geraeusche fuer Spieler in diesem Ring */
+    private static final double LURE_MIN = 8;
+    private static final double LURE_MAX = 24;
+    private static final double SPRINT_SPEED = 0.45;
+    private static final int CHASE_TIMEOUT_TICKS = 300;
+    /**
+     * Passagiere sitzen beim Zombie ~1.6 Bloecke ueber den Fuessen auf, Block-Displays
+     * rendern von ihrer Position nach oben — dieser Versatz stellt die Gestalt auf den
+     * Boden, sodass der Kopf auch unter 3er-Decken bleibt.
+     */
+    private static final double BODY_Y_OFFSET = -1.6;
+
+    private final List<Entity> bodyDisplays = new ArrayList<>();
+    private long lastLureTick = 0;
+    /** Wandtextur des Levels — die Tarnfarbe im Stillstand */
+    private Block camouflageBlock = Block.BLACK_CONCRETE;
+
+    public Bacteria(LevelRuntime level) {
+        super(EntityType.ZOMBIE, level);
+        this.viewRange = 24;
+        this.attackDamage = 5;
+        this.attackCooldownTicks = 25;
+        this.getAttribute(Attribute.MOVEMENT_SPEED).setBaseValue(SPRINT_SPEED);
+        this.setInvisible(true);
+    }
+
+    /**
+     * Koerper nach der Lore: eine skelettartige, humanoide Gestalt aus mehreren
+     * duennen, schwarzen, draht-artigen Segmenten — ueberlange Gliedmassen in
+     * unnatuerlichen Winkeln. Displays haben keine Kollision, der Traeger-Zombie
+     * bleibt normal gross und passt durch alle Raeume.
+     */
+    @Override
+    protected void onSpawned() {
+        // Spawnt getarnt in der Wandtextur; die Jagd faerbt den Koerper schwarz
+        this.camouflageBlock = this.level.getDefinition().palette().wall().getFirst();
+        Block wire = this.camouflageBlock;
+        double height = this.level.getDefinition().palette().roomHeight() - 0.2;
+
+        // Beine: zwei duenne, leicht verkantete Staebe
+        this.spawnBodyPart(wire, new Vec(0.12, height * 0.5, 0.12), new Vec(-0.3, BODY_Y_OFFSET, -0.06), zTilt(8));
+        this.spawnBodyPart(wire, new Vec(0.12, height * 0.5, 0.12), new Vec(0.16, BODY_Y_OFFSET, 0.02), zTilt(-6));
+        // Torso: schmaler, schief sitzender Kern
+        this.spawnBodyPart(wire, new Vec(0.22, height * 0.45, 0.22), new Vec(-0.11, BODY_Y_OFFSET + height * 0.45, -0.11), zTilt(-4));
+        // Arme: ueberlang, in seltsamen Winkeln abgespreizt
+        this.spawnBodyPart(wire, new Vec(0.1, height * 0.5, 0.1), new Vec(-0.45, BODY_Y_OFFSET + height * 0.42, 0), zTilt(25));
+        this.spawnBodyPart(wire, new Vec(0.1, height * 0.55, 0.1), new Vec(0.32, BODY_Y_OFFSET + height * 0.38, 0.06), zTilt(-18));
+        // Kopf: kleiner, versetzter Klumpen ohne Gesicht
+        this.spawnBodyPart(wire, new Vec(0.32, 0.35, 0.32), new Vec(-0.16, BODY_Y_OFFSET + height * 0.9, -0.16), null);
+    }
+
+    /** Faerbt alle Koerperteile um (Tarnung an/aus). */
+    private void setBodyBlock(Block block) {
+        this.bodyDisplays.forEach(display ->
+            ((BlockDisplayMeta) display.getEntityMeta()).setBlockState(block)
+        );
+    }
+
+    /** Quaternion fuer eine Neigung um die Z-Achse (Grad). */
+    private static float[] zTilt(double degrees) {
+        double half = Math.toRadians(degrees) / 2;
+        return new float[]{0, 0, (float) Math.sin(half), (float) Math.cos(half)};
+    }
+
+    private void spawnBodyPart(Block block, Vec scale, Vec translation, float[] leftRotation) {
+        Entity display = new Entity(EntityType.BLOCK_DISPLAY);
+        BlockDisplayMeta meta = (BlockDisplayMeta) display.getEntityMeta();
+        meta.setBlockState(block);
+        meta.setScale(scale);
+        meta.setTranslation(translation);
+        if(leftRotation != null) meta.setLeftRotation(leftRotation);
+        display.updateViewableRule(viewer ->
+            Math.abs(viewer.getPosition().y() - this.getPosition().y()) < LevelRuntime.LEVEL_HEIGHT
+        );
+        display.setInstance(this.getInstance(), this.getPosition());
+        this.addPassenger(display);
+        this.bodyDisplays.add(display);
+    }
+
+    @Override
+    public void remove() {
+        this.bodyDisplays.forEach(Entity::remove);
+        super.remove();
+    }
+
+    @Override
+    public void monsterTick(long tick) {
+        if(this.state == State.CHASE) {
+            this.chaseTick(tick);
+            return;
+        }
+
+        // Tarnung: absolute Regungslosigkeit — er IST die Wand
+        Player closest = this.level.playersInLevel().stream()
+            .min((a, b) -> Double.compare(this.getDistance(a), this.getDistance(b)))
+            .orElse(null);
+        if(closest == null) return;
+
+        double distance = this.getDistance(closest);
+        double trigger = closest.isSneaking() ? SNEAK_TRIGGER_DISTANCE : TRIGGER_DISTANCE;
+
+        if(distance < trigger) {
+            // Ausbruch: die Tarnung faellt — der Koerper wird schwarz, dann der Schrei und der Sprint
+            this.target = closest;
+            this.setState(State.CHASE, tick);
+            this.setBodyBlock(Block.BLACK_CONCRETE);
+            this.emitSound(SoundEvent.ENTITY_GHAST_SCREAM, 1.6f, 0.4f);
+            this.emitSound(SoundEvent.ENTITY_ENDERMAN_SCREAM, 1.2f, 0.4f);
+            return;
+        }
+
+        // Koeder: imitierte menschliche Geraeusche locken Spieler in seine Richtung
+        if(distance >= LURE_MIN && distance <= LURE_MAX && tick - this.lastLureTick > 240) {
+            this.lastLureTick = tick;
+            if(this.level.getRnd().nextBoolean()) {
+                this.emitSound(SoundEvent.BLOCK_STONE_STEP, 0.9f, 0.8f);
+            } else {
+                this.emitSound(SoundEvent.ENTITY_ZOMBIE_AMBIENT, 0.7f, 0.35f);
+            }
+        }
+    }
+
+    private void chaseTick(long tick) {
+        if(this.target == null || this.target.isRemoved()
+            || !this.level.playersInLevel().contains(this.target)
+            || tick - this.stateSince > CHASE_TIMEOUT_TICKS
+            || this.getDistance(this.target) > this.viewRange) {
+            // Beute verloren: schlagartig erstarren und zurueck in die Tarnfarbe
+            this.target = null;
+            this.setState(State.IDLE, tick);
+            this.getNavigator().setPathTo(null);
+            this.setBodyBlock(this.camouflageBlock);
+            this.emitSound(SoundEvent.BLOCK_STONE_PLACE, 0.8f, 0.5f);
+            return;
+        }
+
+        if(tick % 6 < 2) this.moveTo(this.target.getPosition(), SPRINT_SPEED);
+        this.tryAttack(this.target, tick);
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/monster/Clump.java

@@ -0,0 +1,59 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import net.minestom.server.entity.EntityType;
+import net.minestom.server.entity.Player;
+import net.minestom.server.entity.attribute.Attribute;
+import net.minestom.server.entity.metadata.cube.SlimeMeta;
+import net.minestom.server.sound.SoundEvent;
+
+import java.util.Comparator;
+import java.util.Optional;
+
+/**
+ * Clump: getarnte Proximity-Falle. Wartet regungslos, springt einen Spieler an,
+ * der zu nah kommt, und verschwindet 3 Sekunden nach dem Jumpscare.
+ */
+public class Clump extends BackroomsMonster {
+    private static final double TRIGGER_RANGE = 2.5;
+    private static final int DESPAWN_DELAY_TICKS = 60;
+
+    public Clump(LevelRuntime level) {
+        super(EntityType.SLIME, level);
+        this.attackDamage = 4;
+        this.attackRange = 3;
+        if(this.getEntityMeta() instanceof SlimeMeta slimeMeta) {
+            slimeMeta.setSize(2);
+        } else {
+            this.getAttribute(Attribute.SCALE).setBaseValue(0.7);
+        }
+    }
+
+    @Override
+    public void monsterTick(long tick) {
+        switch(this.state) {
+            case IDLE -> this.nearestPlayerInRange().ifPresent(player -> this.jumpscare(player, tick));
+            case ATTACK -> {
+                if(this.target != null && !this.target.isRemoved()) this.tryAttack(this.target, tick);
+                if(tick - this.stateSince >= DESPAWN_DELAY_TICKS) this.remove();
+            }
+            default -> this.setState(State.IDLE, tick);
+        }
+    }
+
+    private Optional<Player> nearestPlayerInRange() {
+        return this.level.playersInLevel().stream()
+            .filter(player -> this.getDistance(player) < TRIGGER_RANGE)
+            .min(Comparator.comparingDouble(this::getDistance));
+    }
+
+    private void jumpscare(Player player, long tick) {
+        this.target = player;
+        this.emitSound(SoundEvent.ENTITY_SLIME_ATTACK, 1.5f, 0.8f);
+        this.emitSound(SoundEvent.ENTITY_ENDERMAN_SCREAM, 1.2f, 0.7f);
+        var leap = player.getPosition().sub(this.getPosition()).asVec().withY(0).normalize().mul(8).withY(6);
+        this.setVelocity(this.getVelocity().add(leap));
+        this.tryAttack(player, tick);
+        this.setState(State.ATTACK, tick);
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/monster/Deathmoth.java

@@ -0,0 +1,62 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import net.minestom.server.coordinate.Vec;
+import net.minestom.server.entity.EntityType;
+import net.minestom.server.entity.Player;
+import net.minestom.server.entity.attribute.Attribute;
+import net.minestom.server.sound.SoundEvent;
+
+/**
+ * Deathmoth: kleiner fliegender Schwarmjaeger (Phantom-Modell). Umkreist die Beute
+ * flatternd und stuerzt sich in kurzen Attacken auf sie — wenig Schaden, viel Unruhe.
+ */
+public class Deathmoth extends BackroomsMonster {
+    private int swoopCooldown = 0;
+
+    public Deathmoth(LevelRuntime level) {
+        super(EntityType.PHANTOM, level);
+        this.viewRange = 26;
+        this.attackDamage = 2;
+        this.attackRange = 2.0;
+        this.attackCooldownTicks = 30;
+        this.getAttribute(Attribute.SCALE).setBaseValue(0.6);
+        this.setNoGravity(true);
+    }
+
+    @Override
+    public void monsterTick(long tick) {
+        if(this.target == null || this.target.isRemoved() || !this.canSee(this.target)) {
+            this.target = this.nearestVisiblePlayer().orElse(null);
+        }
+
+        if(this.target == null) {
+            // Flatterndes Schweben auf der Stelle
+            if(tick % 20 < 2) {
+                this.setVelocity(new Vec(
+                    (this.level.getRnd().nextDouble() - 0.5) * 3,
+                    (this.level.getRnd().nextDouble() - 0.3) * 1.5,
+                    (this.level.getRnd().nextDouble() - 0.5) * 3
+                ));
+            }
+            return;
+        }
+
+        Player player = this.target;
+        if(tick % 10 < 2) {
+            // Zielpunkt: leicht ueber dem Kopf der Beute, Sturzflug wenn Cooldown vorbei
+            this.swoopCooldown = Math.max(0, this.swoopCooldown - 10);
+            double height = this.swoopCooldown > 0 ? 2.5 : 0.5;
+            Vec toPlayer = player.getPosition().add(0, height, 0).sub(this.getPosition()).asVec();
+            if(toPlayer.length() > 0.5) {
+                this.setVelocity(toPlayer.normalize().mul(this.swoopCooldown > 0 ? 3.5 : 6));
+            }
+            if(tick % 40 < 2) this.emitSound(SoundEvent.ENTITY_PHANTOM_FLAP, 0.8f, 1.4f);
+        }
+
+        if(this.tryAttack(player, tick)) {
+            this.swoopCooldown = 60;
+            this.emitSound(SoundEvent.ENTITY_PHANTOM_BITE, 1f, 1.3f);
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/monster/Hound.java

@@ -0,0 +1,64 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import net.kyori.adventure.sound.Sound;
+import net.minestom.server.entity.EntityType;
+import net.minestom.server.entity.EquipmentSlot;
+import net.minestom.server.entity.attribute.Attribute;
+import net.minestom.server.sound.SoundEvent;
+
+/**
+ * Hound: patrouilliert das Level, knurrt bei Sichtkontakt und jagt den Spieler,
+ * bis er ihn 200 Ticks lang nicht mehr sieht.
+ */
+public class Hound extends BackroomsMonster {
+    private long lastSeenTick = 0;
+
+    public Hound(LevelRuntime level) {
+        super(EntityType.ZOMBIE, level);
+        this.viewRange = 28;
+        this.attackDamage = 3;
+        this.getAttribute(Attribute.MOVEMENT_SPEED).setBaseValue(0.22);
+        this.getAttribute(Attribute.SCALE).setBaseValue(1.15);
+        this.setEquipment(EquipmentSlot.HELMET, MonsterAppearance.playerHead(MonsterAppearance.HOUND_HEAD));
+    }
+
+    @Override
+    public void monsterTick(long tick) {
+        switch(this.state) {
+            case IDLE -> {
+                if(tick % 40 < 2) this.wander(0.1);
+                this.nearestVisiblePlayer().ifPresent(player -> {
+                    this.target = player;
+                    this.lastSeenTick = tick;
+                    this.setState(State.ALERT, tick);
+                    this.getNavigator().setPathTo(null);
+                    this.emitSound(SoundEvent.ENTITY_WOLF_GROWL, 1.2f, 0.6f);
+                    player.playSound(Sound.sound(SoundEvent.ENTITY_WARDEN_HEARTBEAT, Sound.Source.HOSTILE, 0.4f, 1f));
+                });
+            }
+            case ALERT -> {
+                if(tick - this.stateSince >= 40) this.setState(State.CHASE, tick);
+            }
+            case CHASE, ATTACK -> {
+                if(this.target == null || this.target.isRemoved() || !this.level.playersInLevel().contains(this.target)) {
+                    this.target = null;
+                    this.setState(State.RETREAT, tick);
+                    return;
+                }
+                if(this.canSee(this.target)) this.lastSeenTick = tick;
+                if(tick - this.lastSeenTick > 100) {
+                    this.target = null;
+                    this.setState(State.RETREAT, tick);
+                    return;
+                }
+                if(tick % 10 < 2) this.moveTo(this.target.getPosition(), 0.25);
+                this.tryAttack(this.target, tick);
+            }
+            case RETREAT -> {
+                if(tick % 40 < 2) this.wander(0.1);
+                if(tick - this.stateSince >= 100) this.setState(State.IDLE, tick);
+            }
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/monster/MonsterAppearance.java

@@ -0,0 +1,41 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster;
+
+import net.minestom.server.color.Color;
+import net.minestom.server.component.DataComponents;
+import net.minestom.server.entity.PlayerSkin;
+import net.minestom.server.item.ItemStack;
+import net.minestom.server.item.Material;
+import net.minestom.server.network.player.ResolvableProfile;
+
+/**
+ * Statische Helfer fuer das Aussehen der Backrooms-Monster: Custom Heads aus
+ * Base64-Texturen und gefaerbte Lederruestung.
+ */
+public final class MonsterAppearance {
+    /** Hound (Backrooms) — duesterer Hundekopf. */
+    public static final String HOUND_HEAD =
+        "eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvZDgzMzhiMGIxNDkyMDU5YzIzMGNjYzg5ZmNhZTE0ZThhODU1ZTcwYjllNWVhNDVjYWIzZjVmNWI5ODJkYzc4MiJ9fX0=";
+    /** Smiler — weisses Grinsen auf schwarzem Grund (minecraft-heads.com #74583). */
+    public static final String SMILER_HEAD =
+        "eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvODc2ZmViODIxZTVkYTE1NTRiODkzZmM1MzY1ZjdiN2E5ODY3M2QxZjliNzU3OTZiODdmNzRlM2M5NjFjMGU3OCJ9fX0=";
+    /** Partygoer — gelber Smiley. */
+    public static final String PARTYGOER_HEAD =
+        "eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvZDI1MzUwODhkNDQ1ZDZhNDQ5ODc2YWRhOTg4ZmExMDc5ZDU3MmQyMTQ3MTNiYjNkY2VhMWRhM2JjNGY3ZDk2YiJ9fX0=";
+
+    private MonsterAppearance() {
+    }
+
+    /** Spielerkopf mit Custom-Textur (Base64 des textures-JSON). */
+    public static ItemStack playerHead(String base64Textures) {
+        return ItemStack.builder(Material.PLAYER_HEAD)
+            .set(DataComponents.PROFILE, new ResolvableProfile(new PlayerSkin(base64Textures, null)))
+            .build();
+    }
+
+    /** Gefaerbtes Lederruestungsteil, rgb z.B. 0xFFD83D. */
+    public static ItemStack dyedLeather(Material leatherPiece, int rgb) {
+        return ItemStack.builder(leatherPiece)
+            .set(DataComponents.DYED_COLOR, new Color(rgb))
+            .build();
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/monster/Partygoer.java

@@ -0,0 +1,49 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import net.minestom.server.entity.EntityType;
+import net.minestom.server.entity.EquipmentSlot;
+import net.minestom.server.entity.attribute.Attribute;
+import net.minestom.server.item.Material;
+import net.minestom.server.potion.Potion;
+import net.minestom.server.potion.PotionEffect;
+import net.minestom.server.sound.SoundEvent;
+
+/**
+ * Partygoer: verfolgt unablaessig langsam den naechsten sichtbaren Spieler und
+ * "feiert" dabei hoerbar. Treffer verlangsamen den Spieler — die beginnende
+ * Verwandlung.
+ */
+public class Partygoer extends BackroomsMonster {
+    public Partygoer(LevelRuntime level) {
+        super(EntityType.ZOMBIE, level);
+        this.viewRange = 32;
+        this.attackDamage = 3;
+        this.getAttribute(Attribute.MOVEMENT_SPEED).setBaseValue(0.15);
+        this.getAttribute(Attribute.SCALE).setBaseValue(1.1);
+        this.setEquipment(EquipmentSlot.HELMET, MonsterAppearance.playerHead(MonsterAppearance.PARTYGOER_HEAD));
+        this.setEquipment(EquipmentSlot.CHESTPLATE, MonsterAppearance.dyedLeather(Material.LEATHER_CHESTPLATE, 0xFFD83D));
+    }
+
+    @Override
+    public void monsterTick(long tick) {
+        if(tick % 160 < 2) {
+            SoundEvent celebration = this.level.getRnd().nextBoolean()
+                ? SoundEvent.ENTITY_VILLAGER_CELEBRATE
+                : SoundEvent.BLOCK_NOTE_BLOCK_BIT;
+            this.emitSound(celebration, 1f, 1.2f);
+        }
+
+        this.target = this.nearestVisiblePlayer().orElse(null);
+        if(this.target != null) {
+            this.setState(State.CHASE, tick);
+            if(tick % 10 < 2) this.moveTo(this.target.getPosition(), 0.17);
+            if(this.tryAttack(this.target, tick)) {
+                this.target.addEffect(new Potion(PotionEffect.SLOWNESS, 0, 60));
+            }
+        } else {
+            this.setState(State.IDLE, tick);
+            if(tick % 40 < 2) this.wander(0.1);
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/monster/Smiler.java

@@ -0,0 +1,132 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.ambience.Jumpscare;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelLayout;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import net.kyori.adventure.sound.Sound;
+import net.minestom.server.coordinate.Vec;
+import net.minestom.server.entity.Entity;
+import net.minestom.server.entity.EntityType;
+import net.minestom.server.entity.Player;
+import net.minestom.server.entity.attribute.Attribute;
+import net.minestom.server.entity.metadata.display.AbstractDisplayMeta;
+import net.minestom.server.entity.metadata.display.ItemDisplayMeta;
+import net.minestom.server.sound.SoundEvent;
+
+/**
+ * Smiler: unsichtbarer Koerper, nur der grinsende Kopf schwebt in der Dunkelheit.
+ * Dreht sich immer zum Spieler (das Grinsen folgt dir), friert ein, solange er
+ * direkt angesehen wird, und kriecht sonst stetig naeher. Verlaesst die Dunkelzone
+ * nur fuer den finalen Schlag.
+ */
+public class Smiler extends BackroomsMonster {
+    /** Groesse des Grinsens (Item-Display, unabhaengig von der Koerpergroesse) */
+    private static final float GRIN_SCALE = 2.2f;
+    /** Versatz relativ zum Aufsitzpunkt: Grinsen auf Brust-/Augenhoehe, nicht im Boden */
+    private static final float GRIN_Y_OFFSET = 0.4f;
+
+    private Entity headDisplay;
+
+    public Smiler(LevelRuntime level) {
+        super(EntityType.ZOMBIE, level);
+        this.viewRange = 16;
+        this.attackDamage = 4;
+        this.ignoresDarkness = true;
+        this.getAttribute(Attribute.MOVEMENT_SPEED).setBaseValue(0.11);
+        this.setInvisible(true);
+    }
+
+    /**
+     * Das Grinsen ist ein grosses Item-Display, das als Passagier mitfaehrt:
+     * frei skalierbar, tief positioniert, und per Billboard dreht es sich
+     * clientseitig immer zu jedem Betrachter.
+     */
+    @Override
+    protected void onSpawned() {
+        this.headDisplay = new Entity(EntityType.ITEM_DISPLAY);
+        ItemDisplayMeta meta = (ItemDisplayMeta) this.headDisplay.getEntityMeta();
+        meta.setItemStack(MonsterAppearance.playerHead(MonsterAppearance.SMILER_HEAD));
+        meta.setScale(new Vec(GRIN_SCALE, GRIN_SCALE, GRIN_SCALE));
+        meta.setTranslation(new Vec(0, GRIN_Y_OFFSET, 0));
+        meta.setBillboardRenderConstraints(AbstractDisplayMeta.BillboardConstraints.CENTER);
+        // Player-Heads rendern im Item-Display mit dem Hinterkopf zur Kamera —
+        // 180 Grad um die Y-Achse drehen, damit das Grinsen den Betrachter ansieht
+        meta.setLeftRotation(new float[]{0, 1, 0, 0});
+        this.headDisplay.updateViewableRule(viewer ->
+            Math.abs(viewer.getPosition().y() - this.getPosition().y()) < LevelRuntime.LEVEL_HEIGHT
+        );
+        this.headDisplay.setInstance(this.getInstance(), this.getPosition());
+        this.addPassenger(this.headDisplay);
+    }
+
+    @Override
+    public void remove() {
+        if(this.headDisplay != null) this.headDisplay.remove();
+        super.remove();
+    }
+
+    @Override
+    public void monsterTick(long tick) {
+        // Ziel finden bzw. validieren — jeder sichtbare Spieler in Reichweite triggert
+        if(this.target == null || this.target.isRemoved() || !this.canSee(this.target)) {
+            Player next = this.nearestVisiblePlayer().orElse(null);
+            if(next != null && this.target == null) {
+                // Erster Sichtkontakt: leises Knistern beim Spieler
+                next.playSound(
+                    Sound.sound(SoundEvent.BLOCK_SCULK_SENSOR_CLICKING, Sound.Source.HOSTILE, 0.6f, 0.5f),
+                    Sound.Emitter.self()
+                );
+            }
+            this.target = next;
+        }
+
+        if(this.target == null) {
+            this.setState(State.IDLE, tick);
+            this.getNavigator().setPathTo(null);
+            return;
+        }
+
+        this.setState(State.CHASE, tick);
+        // Das Grinsen folgt dir immer
+        this.lookAt(this.target);
+
+        if(this.tryAttack(this.target, tick)) {
+            // Der Schlag aus der Dunkelheit ist DER Jumpscare-Moment des Smilers
+            Jumpscare.visual(this.target, this.getInstance());
+        }
+
+        // Blickkontakt friert ihn ein — wegsehen laesst ihn weiterkriechen
+        if(this.playerLooksAtMe(this.target)) {
+            this.getNavigator().setPathTo(null);
+            return;
+        }
+
+        if(tick % 10 < 2) {
+            LevelLayout layout = this.level.getLayout();
+            boolean selfInDark = layout.isDarkAt(this.getPosition());
+            boolean closeKill = this.getDistance(this.target) < 4;
+
+            if(selfInDark || closeKill) {
+                // Sprintende Beute macht ihn schneller
+                double speed = this.target.isSprinting() ? 0.18 : 0.11;
+                this.moveTo(this.target.getPosition(), speed);
+            } else {
+                // Zurueck in die Dunkelheit lauern
+                this.wanderIntoDark();
+            }
+        }
+    }
+
+    private void wanderIntoDark() {
+        LevelLayout layout = this.level.getLayout();
+        int cx = layout.cellX(this.getPosition().x());
+        int cz = layout.cellZ(this.getPosition().z());
+        for(int attempt = 0; attempt < 8; attempt++) {
+            int nx = cx + this.level.getRnd().nextInt(5) - 2;
+            int nz = cz + this.level.getRnd().nextInt(5) - 2;
+            if(!layout.isWalkable(nx, nz) || !layout.isDarkCell(nx, nz)) continue;
+            this.moveTo(this.level.toPlayerPos(new int[]{nx, nz}), 0.11);
+            return;
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/monster/Wretch.java

@@ -0,0 +1,42 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import net.minestom.server.entity.EntityType;
+import net.minestom.server.entity.attribute.Attribute;
+import net.minestom.server.sound.SoundEvent;
+
+/**
+ * Wretch: ausgezehrter, durchgehend feindseliger Humanoid (Husk-Modell).
+ * Kein Warnverhalten wie der Hound — sieht er dich, rennt er sofort los.
+ * Schnell, aber schwach: der Schrecken liegt im Tempo.
+ */
+public class Wretch extends BackroomsMonster {
+    public Wretch(LevelRuntime level) {
+        super(EntityType.HUSK, level);
+        this.viewRange = 26;
+        this.attackDamage = 2;
+        this.attackCooldownTicks = 15;
+        this.getAttribute(Attribute.MOVEMENT_SPEED).setBaseValue(0.28);
+        this.getAttribute(Attribute.SCALE).setBaseValue(0.95);
+    }
+
+    @Override
+    public void monsterTick(long tick) {
+        if(this.target == null || this.target.isRemoved() || !this.canSee(this.target)) {
+            this.target = this.nearestVisiblePlayer().orElse(null);
+            if(this.target != null) {
+                this.setState(State.CHASE, tick);
+                this.emitSound(SoundEvent.ENTITY_HUSK_AMBIENT, 1.2f, 0.6f);
+            }
+        }
+
+        if(this.target == null) {
+            this.setState(State.IDLE, tick);
+            if(tick % 40 < 2) this.wander(0.12);
+            return;
+        }
+
+        if(tick % 10 < 2) this.moveTo(this.target.getPosition(), 0.3);
+        this.tryAttack(this.target, tick);
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/sanity/SanityManager.java

@@ -0,0 +1,101 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.sanity;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.BackroomsGame;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.BackroomsPlayer;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.ambience.Jumpscare;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import net.kyori.adventure.sound.Sound;
+import net.minestom.server.entity.GameMode;
+import net.minestom.server.entity.Player;
+import net.minestom.server.entity.damage.DamageType;
+import net.minestom.server.potion.Potion;
+import net.minestom.server.potion.PotionEffect;
+import net.minestom.server.sound.SoundEvent;
+import net.minestom.server.timer.ExecutionType;
+import net.minestom.server.timer.TaskSchedule;
+
+import java.util.Random;
+
+/**
+ * Leichtgewichtige Sanity: sinkt in Dunkelheit und Monsternaehe, steigt im Licht.
+ * Niedrige Werte erzeugen Halluzinationen (Fake-Scares, Herzschlag, Dunkelheits-Pulse);
+ * toedlich ist Sanity nur im Hardcore-Modus.
+ */
+public class SanityManager {
+    private final BackroomsGame game;
+    private final boolean hardcore;
+    private final Random rnd = new Random();
+
+    public SanityManager(BackroomsGame game, boolean hardcore) {
+        this.game = game;
+        this.hardcore = hardcore;
+    }
+
+    public void start() {
+        this.game.scheduler().submitTask(() -> {
+            if(!this.game.isRunning()) return TaskSchedule.stop();
+            this.game.getPlayers().stream()
+                .filter(player -> player.getGameMode() == GameMode.ADVENTURE)
+                .forEach(player -> {
+                    try {
+                        this.tickPlayer(player);
+                    } catch(Exception e) {
+                        // Ein Fehler darf den Sanity-Task nicht dauerhaft toeten
+                        net.minestom.server.MinecraftServer.getExceptionManager().handleException(e);
+                    }
+                });
+            return TaskSchedule.seconds(1);
+        }, ExecutionType.TICK_END);
+    }
+
+    private void tickPlayer(Player player) {
+        BackroomsPlayer state = this.game.playerState(player);
+        if(state == null) return;
+        LevelRuntime level = this.game.getLevels().get(state.getLevelIndex());
+
+        double delta = 0.01;
+        boolean inDark = level.getDefinition().permanentDarkness()
+            || level.isBlackoutActive()
+            || level.getLayout().isDarkAt(player.getPosition());
+        if(inDark) delta = -0.01;
+
+        boolean monsterNearby = level.getMonsters().stream()
+            .anyMatch(monster -> !monster.isRemoved() && monster.getDistance(player) < 8);
+        if(monsterNearby) delta -= 0.02;
+
+        // Dunkelheit ist nie sicher: kleine Chance auf einen Scare, unabhaengig von der Sanity
+        if(inDark && this.rnd.nextInt(100) < 3) {
+            if(this.rnd.nextInt(4) == 0) {
+                Jumpscare.visual(player, this.game);
+            } else {
+                Jumpscare.sound(player, this.rnd);
+            }
+        }
+
+        state.setSanity(Math.clamp(state.getSanity() + delta, 0, 1));
+        player.setExp((float) state.getSanity());
+
+        double sanity = state.getSanity();
+        if(sanity < 0.6 && this.rnd.nextInt(100) < 5) {
+            player.playSound(Sound.sound(SoundEvent.AMBIENT_CAVE, Sound.Source.AMBIENT, 0.7f, 0.5f), Sound.Emitter.self());
+        }
+        if(sanity < 0.4 && this.rnd.nextInt(100) < 8) {
+            Jumpscare.fake(player, this.rnd);
+            player.playSound(Sound.sound(SoundEvent.ENTITY_WARDEN_HEARTBEAT, Sound.Source.AMBIENT, 0.9f, 1f), Sound.Emitter.self());
+        }
+        if(sanity < 0.2) {
+            if(this.rnd.nextInt(100) < 20) player.addEffect(new Potion(PotionEffect.DARKNESS, (byte) 0, 45));
+            if(this.rnd.nextInt(100) < 5) Jumpscare.visual(player, this.game);
+        }
+        if(this.hardcore && sanity <= 0 && this.rnd.nextInt(3) == 0) {
+            player.damage(DamageType.MAGIC, 1);
+        }
+    }
+
+    public void restore(Player player, double amount) {
+        BackroomsPlayer state = this.game.playerState(player);
+        if(state == null) return;
+        state.setSanity(Math.clamp(state.getSanity() + amount, 0, 1));
+        player.setExp((float) state.getSanity());
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/transition/TransitionManager.java

@@ -0,0 +1,87 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.transition;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.BackroomsGame;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.BackroomsPlayer;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelLayout;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.TransitionType;
+import net.kyori.adventure.sound.Sound;
+import net.minestom.server.coordinate.Pos;
+import net.minestom.server.entity.Player;
+import net.minestom.server.potion.Potion;
+import net.minestom.server.potion.PotionEffect;
+import net.minestom.server.sound.SoundEvent;
+
+/**
+ * Erkennt Level-Uebergaenge: Fall durch den Exit-Schacht (HOLE/LADDER), Betreten des
+ * Glitch-Bodens, Verweilen an der No-Clip-Wand und das Erreichen des Finale-Ziels.
+ */
+public class TransitionManager {
+
+    private final BackroomsGame game;
+
+    public TransitionManager(BackroomsGame game) {
+        this.game = game;
+    }
+
+    public void onMove(Player player, Pos newPosition) {
+        BackroomsPlayer state = this.game.playerState(player);
+        if(state == null || state.isEscaped() || state.isEliminated()) return;
+
+        LevelRuntime level = this.game.getLevels().get(state.getLevelIndex());
+        TransitionType transition = level.getDefinition().transitionType();
+
+        // Fall durch den offenen Schacht ins naechste Level
+        if(newPosition.y() < level.getBaseY() - 4) {
+            this.game.advanceLevel(player, false);
+            return;
+        }
+
+        // Finale: der Zieleinlauf ist die gesamte Korridorbreite ab der Exit-Zelle
+        if(transition == TransitionType.ESCAPE) {
+            int[] exit = level.getLayout().getExitCell();
+            if(exit != null && level.getLayout().cellX(newPosition.x()) >= exit[0]) this.game.escape(player);
+            return;
+        }
+
+        if(!this.isInExitCell(level, newPosition)) return;
+
+        if(transition == TransitionType.GLITCH_FLOOR) this.game.advanceLevel(player, true);
+    }
+
+    /** Wird alle 10 Ticks aufgerufen: Level-Abgleich und Rueckweg-Sperre. */
+    public void onTick(Player player) {
+        BackroomsPlayer state = this.game.playerState(player);
+        if(state == null || state.isEscaped() || state.isEliminated()) return;
+
+        boolean settled = System.currentTimeMillis() - state.getLevelEnteredMillis() > 5000;
+        if(!settled) return;
+
+        // Selbstheilung: registriertes Level mit der physischen Hoehe abgleichen.
+        // Ohne diesen Abgleich laufen Spieler nach einem verpassten oder
+        // zurueckgekletterten Uebergang in einem Level herum, in dem sie nicht
+        // registriert sind — Monster ohne AI, Level-Events starten nicht.
+        LevelRuntime physical = this.game.levelAt((int) player.getPosition().y());
+        if(physical == null || physical.getIndex() == state.getLevelIndex()) return;
+
+        if(physical.getIndex() > state.getLevelIndex()) {
+            // Drift nach unten (verpasster Uebergang): Zustand nachziehen
+            while(state.getLevelIndex() < physical.getIndex()) {
+                this.game.advanceLevel(player, false);
+            }
+        } else {
+            // Rueckweg gesperrt: die Backrooms holen dich zurueck ins registrierte Level
+            LevelRuntime registered = this.game.getLevels().get(state.getLevelIndex());
+            player.teleport(registered.randomSpawn());
+            player.addEffect(new Potion(PotionEffect.BLINDNESS, (byte) 0, 40));
+            player.playSound(Sound.sound(SoundEvent.BLOCK_PORTAL_TRAVEL, Sound.Source.AMBIENT, 0.4f, 0.4f), Sound.Emitter.self());
+        }
+    }
+
+    private boolean isInExitCell(LevelRuntime level, Pos position) {
+        LevelLayout layout = level.getLayout();
+        int[] exit = layout.getExitCell();
+        if(exit == null) return false;
+        return layout.cellX(position.x()) == exit[0] && layout.cellZ(position.z()) == exit[1];
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/bedwars/Bedwars.java

@@ -26,6 +26,7 @@ import net.minestom.server.item.ItemStack;
 import net.minestom.server.item.Material;
 import net.minestom.server.timer.ExecutionType;
 import net.minestom.server.timer.TaskSchedule;
+import net.minestom.server.world.DimensionType;
 import org.jetbrains.annotations.NotNull;
 
 import java.io.IOException;
@@ -41,7 +42,7 @@ public class Bedwars extends StatelessGame {
 
     public Bedwars() throws IOException {
         super(Dimension.OVERWORLD.key, "Bedwars", new LastWinsScore());
-        this.setChunkLoader(new AnvilLoader(Resource.GAME_MAP.getPath().resolve("bedwars/test")));
+        this.setChunkLoader(new AnvilLoader(Resource.GAME_MAP.getPath().resolve("bedwars/test"), DimensionType.OVERWORLD.key()));
 
         Configuration config = ConfigurationProvider.getProvider(YamlConfiguration.class).load(Resource.GAME_MAP.getPath().resolve("bedwars/test/config.yml").toFile());
         List<String> teamNames = config.getStringList("setup.teams");

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/blockBattle/BlockBattle.java

@@ -0,0 +1,207 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.blockBattle;
+
+import eu.mhsl.minenet.minigames.instance.Dimension;
+import eu.mhsl.minenet.minigames.instance.game.stateless.StatelessGame;
+import eu.mhsl.minenet.minigames.score.FirstWinsScore;
+import eu.mhsl.minenet.minigames.util.BatchUtil;
+import io.github.togar2.pvp.events.FinalAttackEvent;
+import io.github.togar2.pvp.feature.CombatFeatures;
+import net.minestom.server.coordinate.Pos;
+import net.minestom.server.entity.GameMode;
+import net.minestom.server.entity.Player;
+import net.minestom.server.event.player.PlayerBlockBreakEvent;
+import net.minestom.server.event.player.PlayerBlockPlaceEvent;
+import net.minestom.server.event.player.PlayerMoveEvent;
+import net.minestom.server.instance.batch.AbsoluteBlockBatch;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.item.ItemStack;
+import net.minestom.server.item.Material;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.*;
+import java.util.concurrent.CompletableFuture;
+import java.util.stream.Collectors;
+
+public class BlockBattle extends StatelessGame {
+    private final Team teamBlue = new Team(new Pos(0,101,20).add(0.5).withView(180, 0), Team.Color.BLUE);
+    private final Team teamRed = new Team(new Pos(0, 101, -20).add(0.5), Team.Color.RED);
+    private final int itemCount;
+
+    private final Map<Player, Team> teams = new WeakHashMap<>();
+
+    public BlockBattle(int itemCount) {
+        super(Dimension.THE_END.key, "Block Battle", new FirstWinsScore());
+
+        this.itemCount = itemCount;
+
+        this.eventNode().addChild(
+            CombatFeatures.empty()
+                .add(CombatFeatures.VANILLA_ATTACK)
+                .add(CombatFeatures.VANILLA_DAMAGE)
+                .add(CombatFeatures.VANILLA_KNOCKBACK)
+                .build().createNode()
+        );
+
+        this.eventNode().addListener(FinalAttackEvent.class, finalAttackEvent -> {
+            if(this.isBeforeBeginning) finalAttackEvent.setCancelled(true);
+            finalAttackEvent.setBaseDamage(0);
+            ((Player) finalAttackEvent.getTarget()).setHealth(20);
+        });
+    }
+
+    @Override
+    protected void onLoad(@NotNull CompletableFuture<Void> callback) {
+        this.generatePlatform(new Pos(0, 100, 0), Block.GOLD_BLOCK, Block.YELLOW_CONCRETE_POWDER);
+        this.generatePlatform(new Pos(0, 101, 0), Block.AIR, Block.SANDSTONE_SLAB);
+        this.generatePlatform(new Pos(0, 100, 20), Block.BLUE_CONCRETE, Block.BLUE_CONCRETE_POWDER);
+        this.generatePlatform(new Pos(0, 100, -20), Block.RED_CONCRETE, Block.RED_CONCRETE_POWDER);
+        this.generatePlatform(new Pos(-5, 101, -14), Block.RED_STAINED_GLASS, Block.AIR);
+        this.generatePlatform(new Pos(5, 101, 14), Block.BLUE_STAINED_GLASS, Block.AIR);
+
+        AbsoluteBlockBatch batch = new AbsoluteBlockBatch();
+
+        Pos[] positionsRedGlass = {
+            new Pos(2, 102, -9),
+            new Pos(-1, 103, -9),
+            new Pos(-2, 104, -6),
+            new Pos(-5, 103, -7),
+            new Pos(-7, 102, -10),
+            new Pos(3, 102, -12),
+            new Pos(5, 101, -15)
+        };
+
+        Pos[] positionsBlueGlass = {
+            new Pos(-5, 101, 15),
+            new Pos(-3, 102, 12),
+            new Pos(-2, 102, 9),
+            new Pos(1, 103, 9),
+            new Pos(2, 104, 6),
+            new Pos(5, 103, 7),
+            new Pos(7, 102, 10)
+        };
+
+        for(Pos pos : positionsRedGlass)
+            batch.setBlock(pos, Block.RED_STAINED_GLASS);
+
+        for(Pos pos : positionsBlueGlass)
+            batch.setBlock(pos, Block.BLUE_STAINED_GLASS);
+
+        BatchUtil.loadAndApplyBatch(batch, this, () -> {});
+    }
+
+    @Override
+    protected void onBlockPlace(@NotNull PlayerBlockPlaceEvent playerBlockPlaceEvent) {
+        Pos posGoldBlock = new Pos(playerBlockPlaceEvent.getBlockPosition()).sub(0, 1, 0);
+        Block goldBlock = playerBlockPlaceEvent.getInstance().getBlock(posGoldBlock);
+
+        playerBlockPlaceEvent.setCancelled(goldBlock != Block.GOLD_BLOCK);
+
+        playerBlockPlaceEvent.getInstance().scheduler().scheduleNextTick(() -> {
+            Pos middle = new Pos(0, 101, 0);
+            boolean validBlue = true;
+            boolean validRed = true;
+
+            for(int x = middle.blockX()-1; x < middle.blockX()+2; x++) {
+                for(int z = middle.blockZ()-1; z < middle.blockZ()+2; z++) {
+                    if(playerBlockPlaceEvent.getInstance().getBlock(x, 101, z) != Block.BLUE_WOOL) {
+                        validBlue = false;
+                        break;
+                    }
+                }
+                if(!validBlue)
+                    break;
+            }
+
+            for(int x = middle.blockX()-1; x < middle.blockX()+2; x++) {
+                for(int z = middle.blockZ()-1; z < middle.blockZ()+2; z++) {
+                    if(playerBlockPlaceEvent.getInstance().getBlock(x, 101, z) != Block.RED_WOOL) {
+                        validRed = false;
+                        break;
+                    }
+                }
+                if(!validRed)
+                    break;
+            }
+
+            if(!validBlue && !validRed) return;
+            var winningTeam = validBlue ? Team.Color.BLUE : Team.Color.RED;
+            var winningPlayers = this.teams.entrySet().stream()
+                .filter(entry -> entry.getValue().color().equals(winningTeam))
+                .map(Map.Entry::getKey)
+                .collect(Collectors.toSet());
+
+            this.getScore().insertMultiple(winningPlayers);
+            super.stop();
+        });
+    }
+
+    @Override
+    protected void onBlockBreak(@NotNull PlayerBlockBreakEvent playerBlockBreakEvent) {
+        boolean isAllowed = Arrays.stream(Team.Color.values())
+            .map(Team.Color::getMaterial)
+            .map(Material::block)
+            .toList()
+            .contains(playerBlockBreakEvent.getBlock());
+        if(!isAllowed) playerBlockBreakEvent.setCancelled(true);
+    }
+
+    @Override
+    protected void onPlayerMove(@NotNull PlayerMoveEvent playerMoveEvent) {
+        if(playerMoveEvent.getNewPosition().y() < 95) {
+            var player = playerMoveEvent.getPlayer();
+
+            player.teleport(
+                this.isBeforeBeginning
+                    ? this.getSpawn()
+                    : this.teams.get(player).spawnPosition()
+            );
+
+            this.giveItems(player);
+        }
+    }
+
+    @Override
+    protected void onStart() {
+        this.setTeams();
+        this.getPlayers().forEach(player -> player.teleport(this.teams.get(player).spawnPosition()).thenRun(() -> {
+            this.giveItems(player);
+            player.setGameMode(GameMode.SURVIVAL);
+        }));
+    }
+
+    private void generatePlatform(Pos center, Block inner, Block outer) {
+        for(int x = center.blockX()-2; x < center.blockX()+3; x++) {
+            for(int z = center.blockZ()-2; z < center.blockZ()+3; z++) {
+                this.setBlock(x, center.blockY(), z, outer);
+            }
+        }
+
+        for(int x = center.blockX()-1; x < center.blockX()+2; x++) {
+            for(int z = center.blockZ()-1; z < center.blockZ()+2; z++) {
+                this.setBlock(x, center.blockY(), z, inner);
+            }
+        }
+    }
+
+    private void setTeams() {
+        List<Player> players = new ArrayList<>(this.getPlayers());
+        Collections.shuffle(players);
+        int halfPlayers = players.size()/2;
+        players.subList(0, halfPlayers).forEach(player -> this.teams.put(player, this.teamBlue));
+        players.subList(halfPlayers, players.size()).forEach(player -> this.teams.put(player, this.teamRed));
+    }
+
+    @Override
+    public Pos getSpawn() {
+        return new Pos(0, 101, 0).add(0.5);
+    }
+
+    private void giveItems(Player player) {
+        player.getInventory().clear();
+        ItemStack item = ItemStack.of(
+            this.teams.get(player).color().getMaterial(),
+            this.itemCount
+        );
+        player.getInventory().addItemStack(item);
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/blockBattle/BlockBattleFactory.java

@@ -0,0 +1,40 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.blockBattle;
+
+import eu.mhsl.minenet.minigames.instance.game.Game;
+import eu.mhsl.minenet.minigames.instance.game.stateless.config.ConfigManager;
+import eu.mhsl.minenet.minigames.instance.game.stateless.config.GameFactory;
+import eu.mhsl.minenet.minigames.instance.game.stateless.config.Option;
+import eu.mhsl.minenet.minigames.instance.game.stateless.config.common.NumericOption;
+import eu.mhsl.minenet.minigames.instance.room.Room;
+import eu.mhsl.minenet.minigames.message.component.TranslatedComponent;
+import net.minestom.server.item.Material;
+
+import java.util.Map;
+
+public class BlockBattleFactory implements GameFactory {
+    @Override
+    public TranslatedComponent name() {
+        return TranslatedComponent.byId("game_BlockBattle#name");
+    }
+
+    @Override
+    public TranslatedComponent description() {
+        return TranslatedComponent.byId("game_BlockBattle#description");
+    }
+
+    @Override
+    public ConfigManager configuration() {
+        return new ConfigManager()
+            .addOption(new NumericOption("itemCount", Material.WHITE_WOOL, TranslatedComponent.byId("game_BlockBattle#itemCount"), 1, 2, 3));
+    }
+
+    @Override
+    public Material symbol() {
+        return Material.GREEN_CONCRETE;
+    }
+
+    @Override
+    public Game manufacture(Room parent, Map<String, Option<?>> configuration) throws Exception {
+        return new BlockBattle(configuration.get("itemCount").getAsInt()).setParent(parent);
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/blockBattle/Team.java

@@ -0,0 +1,21 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.blockBattle;
+
+import net.minestom.server.coordinate.Pos;
+import net.minestom.server.item.Material;
+
+public record Team(Pos spawnPosition, Color color) {
+    public enum Color {
+        RED(Material.RED_WOOL),
+        BLUE(Material.BLUE_WOOL);
+
+        private final Material block;
+
+        Color(Material block) {
+            this.block = block;
+        }
+
+        public Material getMaterial() {
+            return this.block;
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/boatRace/BoatRace.java

@@ -15,6 +15,7 @@ import net.minestom.server.entity.Player;
 import net.minestom.server.event.player.PlayerMoveEvent;
 import net.minestom.server.instance.anvil.AnvilLoader;
 import net.minestom.server.instance.block.Block;
+import net.minestom.server.world.DimensionType;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.concurrent.CompletableFuture;
@@ -23,7 +24,7 @@ import java.util.concurrent.CompletableFuture;
 public class BoatRace extends StatelessGame {
     public BoatRace() {
         super(Dimension.OVERWORLD.key, "boatRace", new FirstWinsScore());
-        this.setChunkLoader(new AnvilLoader(Resource.GAME_MAP.getPath().resolve("boatRace/woodlandMansion")));
+        this.setChunkLoader(new AnvilLoader(Resource.GAME_MAP.getPath().resolve("boatRace/woodlandMansion"), DimensionType.OVERWORLD.key()));
     }
 
     @Override

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/colorJump/ColorJump.java

@@ -0,0 +1,176 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.colorJump;
+
+import eu.mhsl.minenet.minigames.instance.Dimension;
+import eu.mhsl.minenet.minigames.instance.game.stateless.StatelessGame;
+import eu.mhsl.minenet.minigames.score.LastWinsScore;
+import eu.mhsl.minenet.minigames.util.BatchUtil;
+import eu.mhsl.minenet.minigames.world.generator.terrain.CircularPlateTerrainGenerator;
+import net.minestom.server.MinecraftServer;
+import net.minestom.server.coordinate.Pos;
+import net.minestom.server.entity.GameMode;
+import net.minestom.server.event.inventory.InventoryPreClickEvent;
+import net.minestom.server.event.player.PlayerMoveEvent;
+import net.minestom.server.event.player.PlayerSwapItemEvent;
+import net.minestom.server.instance.batch.AbsoluteBlockBatch;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.item.ItemStack;
+import net.minestom.server.timer.Scheduler;
+import net.minestom.server.timer.TaskSchedule;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.List;
+import java.util.Objects;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ThreadLocalRandom;
+
+public class ColorJump extends StatelessGame {
+    private final List<Block> blocks = List.of(
+        Block.RED_CONCRETE,
+        Block.ORANGE_CONCRETE,
+        Block.YELLOW_CONCRETE,
+        Block.LIME_CONCRETE,
+        Block.LIGHT_BLUE_CONCRETE,
+        Block.BLUE_CONCRETE,
+        Block.PURPLE_CONCRETE,
+        Block.PINK_CONCRETE
+    );
+    private Block currentBlock;
+    private Block blockLastRound;
+    private double roundTime = 5;
+    private final double multiplierNextRoundTime = 0.9;
+
+    public ColorJump() {
+        super(Dimension.THE_END.key, "ColorJump", new LastWinsScore());
+        this.getScore().setIgnoreLastPlayers(1);
+
+        this.setGenerator(new CircularPlateTerrainGenerator(100));
+
+        this.eventNode().addListener(
+            InventoryPreClickEvent.class,
+            inventoryPreClickEvent -> inventoryPreClickEvent.setCancelled(true)
+        );
+
+        this.eventNode().addListener(
+            PlayerSwapItemEvent.class,
+            playerSwapItemEvent -> playerSwapItemEvent.setCancelled(true)
+        );
+    }
+
+    @Override
+    protected void onLoad(@NotNull CompletableFuture<Void> callback) {
+        this.generate();
+    }
+
+    @Override
+    protected void onStart() {
+        this.nextRound();
+    }
+
+    private void nextRound() {
+        this.generate();
+        do {
+            this.currentBlock = this.blocks.get(ThreadLocalRandom.current().nextInt(this.blocks.size()));
+        } while(this.currentBlock == this.blockLastRound);
+        this.blockLastRound = this.currentBlock;
+
+        ItemStack item = ItemStack.of(Objects.requireNonNull(this.currentBlock.registry().material()));
+        this.getPlayers().forEach(player -> {
+            player.getInventory().clear();
+            for(int i = 0; i < 9; i++) {
+                player.getInventory().setItemStack(i, item);
+            }
+        });
+
+        var scheduler = MinecraftServer.getSchedulerManager();
+        TaskSchedule stop = TaskSchedule.stop();
+
+        scheduler.scheduleTask(() -> {
+            if(!this.isRunning) return stop;
+            this.destroyAllExcept(this.currentBlock);
+
+            scheduler.scheduleTask(() -> {
+                if(this.isRunning) this.nextRound();
+                return stop;
+            }, TaskSchedule.seconds(3));
+            return stop;
+        }, TaskSchedule.seconds((long) this.roundTime));
+        this.roundTime = this.roundTime * this.multiplierNextRoundTime;
+        if(this.roundTime <= 1) this.roundTime = 1;
+
+        long totalTicks = (long) (this.roundTime * 20);
+        this.scheduleExpUpdate(scheduler, totalTicks, totalTicks);
+    }
+
+    private void scheduleExpUpdate(Scheduler scheduler, long remainingTicks, long totalTicks) {
+        if (!this.isRunning) return;
+
+        if (remainingTicks <= 0) {
+            this.getPlayers().forEach(player -> {
+                player.setExp(0f);
+                player.setLevel(0);
+            });
+            return;
+        }
+
+        float progress = (float) remainingTicks / totalTicks;
+
+        this.getPlayers().forEach(player -> {
+            player.setExp(progress);
+            player.setLevel((int) Math.ceil(remainingTicks / 20.0));
+        });
+        scheduler.scheduleTask(() -> {
+            this.scheduleExpUpdate(scheduler, remainingTicks -1, totalTicks);
+            return TaskSchedule.stop();
+        }, TaskSchedule.tick(1));
+    }
+
+    private void generate() {
+        int y = 30;
+        AbsoluteBlockBatch batch = new AbsoluteBlockBatch();
+
+        for (int x = -20; x <= 21; x += 2) {
+            for (int z = -11; z <= 10; z += 2) {
+                Block randomBlock = this.blocks.get(ThreadLocalRandom.current().nextInt(this.blocks.size()));
+
+                for (int dx = 0; dx < 2; dx++) {
+                    for (int dz = 0; dz < 2; dz++) {
+                        batch.setBlock(x + dx, y, z + dz, randomBlock);
+                    }
+                }
+            }
+        }
+        BatchUtil.loadAndApplyBatch(batch, this, () -> {});
+    }
+
+    private void destroyAllExcept(Block block) {
+        AbsoluteBlockBatch batch = new AbsoluteBlockBatch();
+        int y = 30;
+
+        for (int x = -20; x <= 21; x++) {
+            for(int z = -11; z <= 10; z++) {
+                Pos blockPos = new Pos(x, y, z);
+                if(this.getBlock(blockPos) != block)
+                    batch.setBlock(blockPos, Block.AIR);
+            }
+        }
+        BatchUtil.loadAndApplyBatch(batch, this, () -> {});
+    }
+
+    @Override
+    public Pos getSpawn() {
+        return new Pos(0, 31, 0);
+    }
+
+    @Override
+    protected void onPlayerMove(@NotNull PlayerMoveEvent playerMoveEvent) {
+        var player = playerMoveEvent.getPlayer();
+
+        if(playerMoveEvent.getNewPosition().y() >= 29)
+            return;
+        player.teleport(this.getSpawn());
+        if(this.isRunning) {
+            this.getScore().insertResult(player);
+            player.setGameMode(GameMode.SPECTATOR);
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/colorJump/ColorJumpFactory.java

@@ -0,0 +1,33 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.colorJump;
+
+import eu.mhsl.minenet.minigames.instance.game.Game;
+import eu.mhsl.minenet.minigames.instance.game.stateless.config.GameFactory;
+import eu.mhsl.minenet.minigames.instance.game.stateless.config.Option;
+import eu.mhsl.minenet.minigames.instance.room.Room;
+import eu.mhsl.minenet.minigames.message.component.TranslatedComponent;
+import net.minestom.server.item.Material;
+
+import java.util.Map;
+
+public class ColorJumpFactory implements GameFactory {
+
+    @Override
+    public TranslatedComponent name() {
+        return TranslatedComponent.byId("game_ColorJump#name");
+    }
+
+    @Override
+    public Material symbol() {
+        return Material.PINK_CONCRETE;
+    }
+
+    @Override
+    public TranslatedComponent description() {
+        return TranslatedComponent.byId("game_ColorJump#description");
+    }
+
+    @Override
+    public Game manufacture(Room parent, Map<String, Option<?>> configuration) throws Exception {
+        return new ColorJump().setParent(parent);
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/elytraRace/ElytraRace.java

@@ -24,6 +24,7 @@ import net.minestom.server.event.player.PlayerMoveEvent;
 import net.minestom.server.event.player.PlayerStartFlyingWithElytraEvent;
 import net.minestom.server.event.player.PlayerStopFlyingWithElytraEvent;
 import net.minestom.server.event.player.PlayerUseItemEvent;
+import net.minestom.server.instance.Chunk;
 import net.minestom.server.instance.batch.AbsoluteBlockBatch;
 import net.minestom.server.instance.block.Block;
 import net.minestom.server.item.ItemStack;
@@ -133,7 +134,7 @@ public class ElytraRace extends StatelessGame {
             return;
         }
 
-        this.playerCheckpoints.putIfAbsent(player, new CheckPointData(this.ringSpacing, this.ringSpacing * 2));
+        this.playerCheckpoints.putIfAbsent(player, new CheckPointData(0, this.ringSpacing));
 
         if(newPos.z() > this.generatedUntil - this.ringSpacing) {
             this.generateRing(this.generatedUntil + this.ringSpacing);
@@ -209,7 +210,16 @@ public class ElytraRace extends StatelessGame {
             point -> batch.setBlock(point, Block.AIR)
         );
 
+        int minChunkX = (ringPos.blockX() - 100) >> 4;
+        int maxChunkX = (ringPos.blockX() + 100) >> 4;
+        int chunkZ = ringPos.blockZ() >> 4;
+
         BatchUtil.loadAndApplyBatch(batch, this, () -> {
+            for(int cx = minChunkX; cx <= maxChunkX; cx++) {
+                Chunk chunk = this.getChunk(cx, chunkZ);
+                if(chunk == null) continue;
+                this.getPlayers().forEach(chunk::sendChunk);
+            }
         });
     }
 
@@ -224,10 +234,12 @@ public class ElytraRace extends StatelessGame {
     }
 
     private void toCheckpoint(Player p) {
+        CheckPointData data = this.playerCheckpoints.get(p);
         Point checkpointPos = this.getRingPositionAtZ(this.playerCheckpoints.get(p).currentCheckpoint);
+        if(data.currentCheckpoint == 0) checkpointPos = this.getSpawn().add(0, 3, 0);
         p.setVelocity(Vec.ZERO);
         p.setFlyingWithElytra(false);
-        p.teleport(Pos.fromPoint(checkpointPos).add(0.5, 0, 0.5));
+        p.teleport(new Pos(checkpointPos).add(0.5, 0, 0.5));
 
         p.setFlying(true);
         p.setFlyingSpeed(0);

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/highGround/HighGround.java

@@ -8,6 +8,7 @@ import io.github.togar2.pvp.events.EntityKnockbackEvent;
 import io.github.togar2.pvp.events.FinalAttackEvent;
 import io.github.togar2.pvp.events.PrepareAttackEvent;
 import io.github.togar2.pvp.feature.CombatFeatures;
+import io.github.togar2.pvp.feature.knockback.KnockbackSettings;
 import net.minestom.server.coordinate.Pos;
 import net.minestom.server.entity.Player;
 import net.minestom.server.event.instance.InstanceTickEvent;
@@ -50,7 +51,15 @@ class HighGround extends StatelessGame {
 
         this.eventNode().addListener(
             EntityKnockbackEvent.class,
-            entityKnockbackEvent -> entityKnockbackEvent.setStrength(1.1f)
+            entityKnockbackEvent -> entityKnockbackEvent.setSettings(
+                KnockbackSettings.builder()
+                    .horizontal(1.1)
+                    .vertical(KnockbackSettings.DEFAULT.vertical())
+                    .verticalLimit(KnockbackSettings.DEFAULT.verticalLimit())
+                    .extraHorizontal(KnockbackSettings.DEFAULT.extraHorizontal())
+                    .extraVertical(KnockbackSettings.DEFAULT.extraVertical())
+                    .build()
+            )
         );
 
         this.eventNode().addListener(InstanceTickEvent.class, instanceTickEvent -> {

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/pillars/Pillars.java

@@ -0,0 +1,143 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.pillars;
+
+import eu.mhsl.minenet.minigames.instance.Dimension;
+import eu.mhsl.minenet.minigames.instance.game.stateless.StatelessGame;
+import eu.mhsl.minenet.minigames.score.LastWinsScore;
+import eu.mhsl.minenet.minigames.util.Position;
+import io.github.togar2.pvp.feature.CombatFeatures;
+import net.minestom.server.MinecraftServer;
+import net.minestom.server.coordinate.Pos;
+import net.minestom.server.entity.GameMode;
+import net.minestom.server.entity.Player;
+import net.minestom.server.event.item.ItemDropEvent;
+import net.minestom.server.event.player.PlayerBlockBreakEvent;
+import net.minestom.server.event.player.PlayerBlockPlaceEvent;
+import net.minestom.server.event.player.PlayerMoveEvent;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.item.ItemStack;
+import net.minestom.server.item.Material;
+import net.minestom.server.timer.TaskSchedule;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+import java.util.concurrent.ThreadLocalRandom;
+
+class Pillars extends StatelessGame {
+    private int spawnPosx = 0;
+    private int spawnPosz = 0;
+    private final int pillarSpacing = 10;
+    private final int pillarRowCount = 5;
+    private final int timeToNextItem = 5;
+
+    private static final Set<String> IGNORED_SUFFIXES = Set.of(
+        "_SWORD", "_PICKAXE", "_AXE", "_SHOVEL", "_HOE",
+        "_HELMET", "_CHESTPLATE", "_LEGGINGS", "_BOOTS",
+        "_BOAT", "_MINECART", "_BUCKET", "_SPAWN_EGG",
+        "_BANNER", "_CANDLE", "_PRESSURE_PLATE", "_TEMPLATE",
+        "_BUTTON", "_HARNESS"
+    );
+
+    private static final Set<Material> IGNORED_EXACT = Set.of(
+        Material.BOW, Material.CROSSBOW, Material.TRIDENT, Material.MACE, Material.SHIELD,
+        Material.SHEARS, Material.FLINT_AND_STEEL, Material.FISHING_ROD, Material.SADDLE,
+        Material.TURTLE_HELMET, Material.ELYTRA,
+        Material.LADDER, Material.VINE, Material.SCAFFOLDING, Material.TWISTING_VINES, Material.WEEPING_VINES,
+        Material.BAMBOO_RAFT,
+        Material.TNT, Material.SPAWNER, Material.END_PORTAL_FRAME,
+        Material.COMMAND_BLOCK, Material.CHAIN_COMMAND_BLOCK, Material.REPEATING_COMMAND_BLOCK,
+        Material.STRUCTURE_BLOCK, Material.STRUCTURE_VOID, Material.JIGSAW,
+        Material.BARRIER, Material.LIGHT, Material.DEBUG_STICK, Material.KNOWLEDGE_BOOK,
+        Material.BEDROCK, Material.AIR
+    );
+
+    private static final Set<Material> IGNORED_MATERIALS = new HashSet<>();
+
+    static {
+        for (Material material : Material.values()) {
+            String id = material.key().asString();
+
+            for (String suffix : IGNORED_SUFFIXES) {
+                if (id.endsWith(suffix.toLowerCase())) {
+                    IGNORED_MATERIALS.add(material);
+                    break;
+                }
+            }
+        }
+    }
+
+    public Pillars() {
+        super(Dimension.THE_END.key, "Pillars", new LastWinsScore());
+        this.getScore().setIgnoreLastPlayers(1);
+
+        this.eventNode().addChild(
+            CombatFeatures.empty()
+                .add(CombatFeatures.VANILLA_ATTACK)
+                .add(CombatFeatures.VANILLA_DAMAGE)
+                .add(CombatFeatures.VANILLA_KNOCKBACK)
+                .build().createNode()
+        );
+    }
+
+    @Override
+    protected boolean onPlayerJoin(Player p) {
+        Pos pos = new Pos(this.spawnPosx * this.pillarSpacing, 100, this.spawnPosz * this.pillarSpacing);
+        this.setBlock(pos.sub(0, 1, 0), Block.BEDROCK);
+
+        if(this.spawnPosx >= this.pillarRowCount) {
+            this.spawnPosx = 0;
+            this.spawnPosz++;
+        }
+        this.spawnPosx++;
+        MinecraftServer.getSchedulerManager().scheduleNextTick(() -> p.teleport(pos.add(0.5, 0, 0.5)));
+
+        return super.onPlayerJoin(p);
+    }
+
+    @Override
+    protected void onBlockPlace(@NotNull PlayerBlockPlaceEvent playerBlockPlaceEvent) {}
+
+    @Override
+    protected void onBlockBreak(@NotNull PlayerBlockBreakEvent playerBlockBreakEvent) {}
+
+    @Override
+    protected void onItemDrop(@NotNull ItemDropEvent itemDropEvent) {}
+
+    @Override
+    public Pos getSpawn() {
+        return new Pos(0, 105, 0);
+    }
+
+    @Override
+    protected void onPlayerMove(@NotNull PlayerMoveEvent playerMoveEvent) {
+        var player = playerMoveEvent.getPlayer();
+
+        if(this.isBeforeBeginning && Position.hasPositionChanged(player.getPosition(), playerMoveEvent.getNewPosition()))
+            playerMoveEvent.setCancelled(true);
+
+        if(playerMoveEvent.getNewPosition().y() < 80) {
+            this.getScore().insertResult(player);
+            player.teleport(this.getSpawn());
+            player.setGameMode(GameMode.SPECTATOR);
+        }
+    }
+
+    @Override
+    protected void onStart() {
+        this.getPlayers().forEach(player -> player.setGameMode(GameMode.SURVIVAL));
+
+        MinecraftServer.getSchedulerManager().submitTask(() -> {
+            List<Material> materials = Material.values().stream()
+                .filter(material -> !IGNORED_EXACT.contains(material))
+                .filter(material -> !IGNORED_MATERIALS.contains(material))
+                .toList();
+            this.getPlayers().forEach(player -> {
+                ItemStack item = ItemStack.of(materials.get(ThreadLocalRandom.current().nextInt(materials.size())));
+                player.getInventory().addItemStack(item);
+            });
+
+            return TaskSchedule.seconds(this.timeToNextItem);
+        });
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/pillars/PillarsFactory.java

@@ -0,0 +1,32 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.pillars;
+
+import eu.mhsl.minenet.minigames.instance.game.Game;
+import eu.mhsl.minenet.minigames.instance.game.stateless.config.GameFactory;
+import eu.mhsl.minenet.minigames.instance.game.stateless.config.Option;
+import eu.mhsl.minenet.minigames.instance.room.Room;
+import eu.mhsl.minenet.minigames.message.component.TranslatedComponent;
+import net.minestom.server.item.Material;
+
+import java.util.Map;
+
+public class PillarsFactory implements GameFactory {
+    @Override
+    public TranslatedComponent name() {
+        return TranslatedComponent.byId("game_Pillars#name");
+    }
+
+    @Override
+    public TranslatedComponent description() {
+        return TranslatedComponent.byId("game_Pillars#description");
+    }
+
+    @Override
+    public Material symbol() {
+        return Material.BEDROCK;
+    }
+
+    @Override
+    public Game manufacture(Room parent, Map<String, Option<?>> configuration) throws Exception {
+        return new Pillars().setParent(parent);
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/PlayerRace.java

@@ -0,0 +1,86 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace;
+
+import eu.mhsl.minenet.minigames.instance.Dimension;
+import eu.mhsl.minenet.minigames.instance.game.stateless.StatelessGame;
+import eu.mhsl.minenet.minigames.score.FirstWinsScore;
+import eu.mhsl.minenet.minigames.util.BatchUtil;
+import eu.mhsl.minenet.minigames.util.CommonProperties;
+import net.minestom.server.coordinate.Pos;
+import net.minestom.server.entity.GameMode;
+import net.minestom.server.entity.Player;
+import net.minestom.server.event.player.PlayerMoveEvent;
+import net.minestom.server.instance.batch.AbsoluteBlockBatch;
+import net.minestom.server.instance.block.Block;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Map;
+import java.util.WeakHashMap;
+import java.util.concurrent.CompletableFuture;
+
+public class PlayerRace extends StatelessGame {
+    private final int height = 64;
+    private final Map<Player, Double> zLine = new WeakHashMap<>();
+    private final Map<Player, Double> zSpawnPoint = new WeakHashMap<>();
+    private final int obstacleCount;
+
+    public PlayerRace(int obstacleCount) {
+        super(Dimension.THE_END.key, "PlayerRace", new FirstWinsScore());
+        this.setGenerator(new PlayerRaceChunkgenerator(this.height, obstacleCount));
+        this.obstacleCount = obstacleCount;
+    }
+
+    @Override
+    protected boolean onPlayerJoin(Player p) {
+        p.setGameMode(GameMode.ADVENTURE);
+        this.zLine.put(p, 32.0);
+        this.zSpawnPoint.put(p, 14.5);
+        return false;
+    }
+
+    @Override
+    protected void onLoad(@NotNull CompletableFuture<Void> callback) {
+        AbsoluteBlockBatch batch = new AbsoluteBlockBatch();
+        for(int x = 0; x < 16; x++) {
+            batch.setBlock(x,this.height + 1, 15, Block.OAK_FENCE.withProperties(CommonProperties.fenceEastWest));
+        }BatchUtil.loadAndApplyBatch(batch, this, () -> callback.complete(null));
+    }
+
+    @Override
+    protected void onStart() {
+        AbsoluteBlockBatch batch = new AbsoluteBlockBatch();
+        for(int x = 0; x < 16; x++) {
+            batch.setBlock(x,this.height + 1, 15, Block.AIR);
+        }BatchUtil.loadAndApplyBatch(batch, this, () -> {});
+    }
+
+    @Override
+    public Pos getSpawn() {
+        return new Pos(8, this.height + 1.5, 8);
+    }
+
+    public Pos getNewSpawn(Player player) {
+        return new Pos(8, this.height + 1.5, this.zSpawnPoint.get(player));
+    }
+
+    @Override
+    protected void onPlayerMove(@NotNull PlayerMoveEvent playerMoveEvent) {
+        var player = playerMoveEvent.getPlayer();
+        if(playerMoveEvent.getNewPosition().y() < this.height - 5) {
+            player.teleport(this.isBeforeBeginning ? this.getSpawn() : this.getNewSpawn(player));
+            return;
+        }
+
+        if(playerMoveEvent.getNewPosition().z() >= this.zLine.get(player) && this.isRunning) {
+            this.zLine.merge(player, 19.0, Double::sum);
+            this.zSpawnPoint.merge(player, 19.0, Double::sum);
+        }
+
+        if(playerMoveEvent.getNewPosition().z() >= 16 + this.obstacleCount * 19 && this.isRunning) {
+            this.getScore().insertResult(player);
+            player.setGameMode(GameMode.SPECTATOR);
+        }
+
+        if(playerMoveEvent.getNewPosition().z() >= 16 && this.isBeforeBeginning)
+            player.teleport(this.getSpawn());
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/PlayerRaceChunkgenerator.java

@@ -0,0 +1,61 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles.Obstacle;
+import eu.mhsl.minenet.minigames.util.GeneratorUtils;
+import eu.mhsl.minenet.minigames.world.BlockPallet;
+import eu.mhsl.minenet.minigames.world.generator.featureEnriched.ValeGenerator;
+import eu.mhsl.minenet.minigames.world.generator.terrain.BaseGenerator;
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.coordinate.Vec;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+public class PlayerRaceChunkgenerator extends BaseGenerator {
+    private static final int START_LENGTH = 16;
+    private static final int GAP_LENGTH = 3;
+    private static final int PERIOD = Obstacle.LENGTH + GAP_LENGTH;
+
+    public PlayerRaceChunkgenerator(int height, int obstacleCount) {
+        ValeGenerator vale = new ValeGenerator();
+        vale.setXShiftMultiplier(integer -> 0.5d);
+        vale.setHeightNoiseMultiplier(integer -> 2);
+        this.addMixIn(vale);
+
+        int finishStart = START_LENGTH + obstacleCount * PERIOD;
+        int finishEnd = finishStart + 16;
+
+        this.addMixIn(unit -> {
+            Point chunkStart = unit.absoluteStart();
+            if(
+                chunkStart.chunkX() != 0 ||
+                chunkStart.blockZ() + 16 <= 0 ||
+                chunkStart.blockZ() >= finishEnd
+            ) return;
+
+            GeneratorUtils.foreachXZ(unit, point -> {
+                Block ground = groundBlockAt(point.blockZ(), finishStart, finishEnd);
+                if(ground != null) unit.modifier().setBlock(point.withY(height), ground);
+            });
+
+            for(int i = 0; i < obstacleCount; i++) {
+                int obstacleZ = START_LENGTH + i * PERIOD;
+                if(obstacleZ < chunkStart.blockZ() || obstacleZ >= chunkStart.blockZ() + 16) continue;
+
+                GenerationUnit fork = unit.fork(
+                    new Vec(chunkStart.blockX(), height - 8, obstacleZ),
+                    new Vec(chunkStart.blockX() + 16, height + 16, obstacleZ + Obstacle.LENGTH)
+                );
+                Obstacle.getRandomObstacle().generate(fork, new Vec(chunkStart.blockX(), height, obstacleZ));
+            }
+        });
+    }
+
+    private static Block groundBlockAt(int z, int finishStart, int finishEnd) {
+        if(z < 0 || z >= finishEnd) return null;
+        if(z < START_LENGTH) return BlockPallet.GROUND.rnd();
+        if(z >= finishStart) return Block.DIAMOND_BLOCK;
+
+        int relative = (z - START_LENGTH) % PERIOD;
+        return relative >= Obstacle.LENGTH ? BlockPallet.GROUND.rnd() : null;
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/PlayerRaceFactory.java

@@ -0,0 +1,40 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace;
+
+import eu.mhsl.minenet.minigames.instance.game.Game;
+import eu.mhsl.minenet.minigames.instance.game.stateless.config.ConfigManager;
+import eu.mhsl.minenet.minigames.instance.game.stateless.config.GameFactory;
+import eu.mhsl.minenet.minigames.instance.game.stateless.config.Option;
+import eu.mhsl.minenet.minigames.instance.game.stateless.config.common.NumericOption;
+import eu.mhsl.minenet.minigames.instance.room.Room;
+import eu.mhsl.minenet.minigames.message.component.TranslatedComponent;
+import net.minestom.server.item.Material;
+
+import java.util.Map;
+
+public class PlayerRaceFactory implements GameFactory {
+    @Override
+    public TranslatedComponent name() {
+        return TranslatedComponent.byId("game_PlayerRace#name");
+    }
+
+    @Override
+    public ConfigManager configuration() {
+        return new ConfigManager()
+            .addOption(new NumericOption("length", Material.RAIL, TranslatedComponent.byId("optionCommon#length"), 8, 12, 16, 20));
+    }
+
+    @Override
+    public Game manufacture(Room parent, Map<String, Option<?>> configuration) throws Exception {
+        return new PlayerRace(configuration.get("length").getAsInt()).setParent(parent);
+    }
+
+    @Override
+    public Material symbol() {
+        return Material.DIRT_PATH;
+    }
+
+    @Override
+    public TranslatedComponent description() {
+        return TranslatedComponent.byId("game_PlayerRace#description");
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/BambooThicket.java

@@ -0,0 +1,30 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+class BambooThicket extends Obstacle {
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point -> {
+            unit.modifier().setBlock(point.withY(start.blockY()), rnd.nextInt(3) == 0 ? Block.PODZOL : Block.GRASS_BLOCK);
+
+            int z = relZ(point, start);
+            if(z < 2 || z > 13 || rnd.nextInt(100) >= 45) return;
+
+            int height = 3 + rnd.nextInt(3);
+            for(int y = 1; y <= height; y++) {
+                String leaves = y == height ? "large" : y == height - 1 ? "small" : "none";
+                unit.modifier().setBlock(
+                    point.withY(start.blockY() + y),
+                    Block.BAMBOO.withProperty("age", "1").withProperty("leaves", leaves)
+                );
+            }
+        });
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/BasaltPillars.java

@@ -0,0 +1,44 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import de.articdive.jnoise.generators.noisegen.perlin.PerlinNoiseGenerator;
+import de.articdive.jnoise.pipeline.JNoise;
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+class BasaltPillars extends Obstacle {
+    private final JNoise ground = JNoise.newBuilder()
+        .perlin(PerlinNoiseGenerator.newBuilder().build())
+        .scale(0.13)
+        .build();
+
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point -> {
+            double noise = this.ground.evaluateNoise(point.blockX(), point.blockZ());
+            Block floor = noise > 0.4 ? Block.SOUL_SOIL : noise < -0.4 ? Block.BASALT : Block.BLACKSTONE;
+            unit.modifier().setBlock(point.withY(start.blockY()), floor);
+        });
+
+        for(int i = 0; i < 16; i++) {
+            int x = rnd.nextInt(16);
+            int z = 2 + rnd.nextInt(12);
+            int height = 2 + rnd.nextInt(3);
+            boolean thick = rnd.nextInt(3) == 0 && x < 15;
+            Block pillar = rnd.nextInt(3) == 0 ? Block.POLISHED_BASALT : Block.BASALT;
+            for(int y = 1; y <= height; y++) {
+                unit.modifier().setBlock(start.add(x, y, z), pillar);
+                if(thick) {
+                    unit.modifier().setBlock(start.add(x + 1, y, z), pillar);
+                }
+            }
+            if(rnd.nextInt(3) == 0) {
+                unit.modifier().setBlock(start.add(x, height + 1, z), Block.SOUL_LANTERN);
+            }
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/BerryPatch.java

@@ -0,0 +1,28 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+class BerryPatch extends Obstacle {
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point -> {
+            int z = relZ(point, start);
+            int pathX = 7 + (int) Math.round(5 * Math.sin(z * Math.PI / 7.5));
+            boolean onPath = relX(point, start) == pathX || relX(point, start) == pathX + 1;
+            boolean overgrown = z == 8;
+
+            unit.modifier().setBlock(point.withY(start.blockY()), onPath ? Block.DIRT_PATH : Block.GRASS_BLOCK);
+
+            boolean bush = onPath ? overgrown : z >= 1 && z <= 14 && rnd.nextInt(100) < 45;
+            if(bush) {
+                unit.modifier().setBlock(point.withY(start.blockY() + 1), Block.SWEET_BERRY_BUSH.withProperty("age", "3"));
+            }
+        });
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/BoulderTrench.java

@@ -0,0 +1,40 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+class BoulderTrench extends Obstacle {
+    private static final int[] DEPTHS = {0, 0, 0, 0, 0, 1, 2, 2, 2, 2, 1, 0, 0, 0, 0, 0};
+
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point -> {
+            int depth = DEPTHS[relZ(point, start)];
+            for(int y = start.blockY() - 2; y < start.blockY() - depth; y++) {
+                unit.modifier().setBlock(point.withY(y), Block.STONE);
+            }
+            Block floor = depth == 0
+                ? Block.GRASS_BLOCK
+                : rnd.nextBoolean() ? Block.COARSE_DIRT : Block.GRAVEL;
+            unit.modifier().setBlock(point.withY(start.blockY() - depth), floor);
+        });
+
+        for(int i = 0; i < 10; i++) {
+            int x = rnd.nextInt(16);
+            int z = 6 + rnd.nextInt(4);
+            unit.modifier().setBlock(start.add(x, -1, z), rnd.nextBoolean() ? Block.MOSSY_COBBLESTONE : Block.COBBLESTONE);
+            if(rnd.nextInt(3) == 0) {
+                unit.modifier().setBlock(start.add(x, 0, z), Block.MOSSY_COBBLESTONE);
+            }
+        }
+
+        for(int i = 0; i < 4; i++) {
+            unit.modifier().setBlock(start.add(rnd.nextInt(16), -1, 6 + rnd.nextInt(4)), Block.COBWEB);
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/ChorusGrove.java

@@ -0,0 +1,65 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+class ChorusGrove extends Obstacle {
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point -> {
+            Block floor = rnd.nextInt(14) == 0 ? Block.PURPUR_BLOCK : Block.END_STONE;
+            unit.modifier().setBlock(point.withY(start.blockY()), floor);
+        });
+
+        int[] rows = {5, 10};
+        for(int i = 0; i < rows.length; i++) {
+            int gapStart = i % 2 == 0 ? 1 + rnd.nextInt(4) : 10 + rnd.nextInt(4);
+
+            boolean[] hasWall = new boolean[16];
+            for(int x = 0; x < 16; x++) {
+                hasWall[x] = x < gapStart || x >= gapStart + 2;
+            }
+
+            for(int x = 0; x < 16; x++) {
+                if(!hasWall[x]) continue;
+                boolean westConnected = x > 0 && hasWall[x - 1];
+                boolean eastConnected = x < 15 && hasWall[x + 1];
+                Block wall = Block.END_STONE_BRICK_WALL
+                    .withProperty("west", westConnected ? "low" : "none")
+                    .withProperty("east", eastConnected ? "low" : "none")
+                    .withProperty("up", String.valueOf(!westConnected || !eastConnected || x % 4 == 0));
+                unit.modifier().setBlock(start.add(x, 1, rows[i]), wall);
+
+                if(rnd.nextInt(6) == 0) {
+                    unit.modifier().setBlock(start.add(x, 2, rows[i]), Block.END_ROD);
+                }
+            }
+        }
+
+        for(int i = 0; i < 15; i++) {
+            int x = rnd.nextInt(16);
+            int z = 2 + rnd.nextInt(12);
+            if(z == 5 || z == 10) continue;
+            int height = 1 + rnd.nextInt(3);
+            for(int y = 1; y <= height; y++) {
+                unit.modifier().setBlock(start.add(x, y, z), Block.CHORUS_PLANT);
+            }
+            unit.modifier().setBlock(start.add(x, height + 1, z), Block.CHORUS_FLOWER.withProperty("age", "5"));
+        }
+
+        for(int i = 0; i < 5; i++) {
+            int x = rnd.nextInt(16);
+            int z = 2 + rnd.nextInt(12);
+            if(z == 5 || z == 10) continue;
+            unit.modifier().setBlock(start.add(x, 1, z), Block.PURPUR_BLOCK);
+            if(rnd.nextBoolean()) {
+                unit.modifier().setBlock(start.add(x, 2, z), Block.PURPUR_BLOCK);
+            }
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/CobwebGrove.java

@@ -0,0 +1,46 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import de.articdive.jnoise.generators.noisegen.perlin.PerlinNoiseGenerator;
+import de.articdive.jnoise.pipeline.JNoise;
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+class CobwebGrove extends Obstacle {
+    private final JNoise soil = JNoise.newBuilder()
+        .perlin(PerlinNoiseGenerator.newBuilder().build())
+        .scale(0.12)
+        .build();
+
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point -> {
+            Block floor = this.soil.evaluateNoise(point.blockX(), point.blockZ()) > 0 ? Block.PODZOL : Block.COARSE_DIRT;
+            unit.modifier().setBlock(point.withY(start.blockY()), floor);
+
+            int z = relZ(point, start);
+            if(z < 2 || z > 13) return;
+
+            int roll = rnd.nextInt(100);
+            if(roll < 28) {
+                unit.modifier().setBlock(point.withY(start.blockY() + 1), Block.COBWEB);
+                if(roll < 8) unit.modifier().setBlock(point.withY(start.blockY() + 2), Block.COBWEB);
+            } else if(roll < 36) {
+                unit.modifier().setBlock(point.withY(start.blockY() + 1), Block.FERN);
+            }
+        });
+
+        for(int i = 0; i < 4; i++) {
+            int x = rnd.nextInt(16);
+            int z = 3 + rnd.nextInt(10);
+            int height = 1 + rnd.nextInt(2);
+            for(int y = 1; y <= height; y++) {
+                unit.modifier().setBlock(start.add(x, y, z), Block.SPRUCE_LOG);
+            }
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/DripstoneSpikes.java

@@ -0,0 +1,46 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+class DripstoneSpikes extends Obstacle {
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point ->
+            unit.modifier().setBlock(point.withY(start.blockY()), rnd.nextInt(6) == 0 ? Block.STONE : Block.DRIPSTONE_BLOCK));
+
+        int[] rows = {4, 8, 12};
+        for(int i = 0; i < rows.length; i++) {
+            int gapStart = i % 2 == 0 ? 2 + rnd.nextInt(4) : 9 + rnd.nextInt(4);
+            for(int x = 0; x < 16; x++) {
+                if(x >= gapStart && x < gapStart + 2) continue;
+                unit.modifier().setBlock(start.add(x, 1, rows[i]), Block.DRIPSTONE_BLOCK);
+                this.placeSpike(unit, start.add(0, 1, 0), x, rows[i], 1 + rnd.nextInt(2));
+            }
+        }
+
+        for(int i = 0; i < 12; i++) {
+            int x = rnd.nextInt(16);
+            int z = 2 + rnd.nextInt(12);
+            if(z == 4 || z == 8 || z == 12) continue;
+            this.placeSpike(unit, start, x, z, 1 + rnd.nextInt(3));
+        }
+    }
+
+    private void placeSpike(GenerationUnit unit, Point start, int x, int z, int height) {
+        for(int y = 1; y <= height; y++) {
+            String thickness = y == height ? "tip" : y == height - 1 ? "frustum" : "base";
+            unit.modifier().setBlock(
+                start.add(x, y, z),
+                Block.POINTED_DRIPSTONE
+                    .withProperty("thickness", thickness)
+                    .withProperty("vertical_direction", "up")
+            );
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/GlassPaneWeave.java

@@ -0,0 +1,36 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+class GlassPaneWeave extends Obstacle {
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point ->
+            unit.modifier().setBlock(point.withY(start.blockY()), rnd.nextInt(5) == 0 ? Block.CALCITE : Block.QUARTZ_BLOCK));
+
+        int[] rows = {4, 8, 12};
+        for(int i = 0; i < rows.length; i++) {
+            int gapStart = i % 2 == 0 ? 2 + rnd.nextInt(3) : 11 + rnd.nextInt(3);
+
+            boolean[] hasPane = new boolean[16];
+            for(int x = 0; x < 16; x++) {
+                hasPane[x] = x < gapStart || x >= gapStart + 2;
+            }
+
+            for(int x = 0; x < 16; x++) {
+                if(!hasPane[x]) continue;
+                Block pane = (rnd.nextInt(6) == 0 ? Block.GRAY_STAINED_GLASS_PANE : Block.WHITE_STAINED_GLASS_PANE)
+                    .withProperty("west", String.valueOf(x > 0 && hasPane[x - 1]))
+                    .withProperty("east", String.valueOf(x < 15 && hasPane[x + 1]));
+                unit.modifier().setBlock(start.add(x, 1, rows[i]), pane);
+                unit.modifier().setBlock(start.add(x, 2, rows[i]), pane);
+            }
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/HayHurdles.java

@@ -0,0 +1,35 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+class HayHurdles extends Obstacle {
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point -> {
+            unit.modifier().setBlock(point.withY(start.blockY()), Block.GRASS_BLOCK);
+            if(relZ(point, start) % 3 != 0 && rnd.nextInt(8) == 0) {
+                unit.modifier().setBlock(point.withY(start.blockY() + 1), Block.SHORT_GRASS);
+            }
+        });
+
+        int[] rows = {3, 6, 9, 12};
+        for(int i = 0; i < rows.length; i++) {
+            boolean tall = i % 2 == 1;
+            int gapStart = rnd.nextInt(14);
+            for(int x = 0; x < 16; x++) {
+                if(tall && (x == gapStart || x == gapStart + 1)) continue;
+                Block block = rnd.nextInt(12) == 0 ? Block.CARVED_PUMPKIN : Block.HAY_BLOCK;
+                unit.modifier().setBlock(start.add(x, 1, rows[i]), block);
+                if(tall) {
+                    unit.modifier().setBlock(start.add(x, 2, rows[i]), Block.HAY_BLOCK);
+                }
+            }
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/HoneyField.java

@@ -0,0 +1,35 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import de.articdive.jnoise.generators.noisegen.perlin.PerlinNoiseGenerator;
+import de.articdive.jnoise.pipeline.JNoise;
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+class HoneyField extends Obstacle {
+    private final JNoise sticky = JNoise.newBuilder()
+        .perlin(PerlinNoiseGenerator.newBuilder().build())
+        .scale(0.2)
+        .build();
+
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point -> {
+            boolean stickyFloor = this.sticky.evaluateNoise(point.blockX(), point.blockZ()) > 0.35;
+            unit.modifier().setBlock(point.withY(start.blockY()), stickyFloor ? Block.HONEY_BLOCK : Block.HONEYCOMB_BLOCK);
+        });
+
+        for(int wallZ : new int[]{5, 10}) {
+            int gapStart = wallZ == 5 ? 1 + rnd.nextInt(5) : 8 + rnd.nextInt(5);
+            for(int x = 0; x < 16; x++) {
+                if(x >= gapStart && x < gapStart + 2) continue;
+                unit.modifier().setBlock(start.add(x, 1, wallZ), Block.HONEY_BLOCK);
+                unit.modifier().setBlock(start.add(x, 2, wallZ), Block.HONEY_BLOCK);
+            }
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/IceRink.java

@@ -0,0 +1,54 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import de.articdive.jnoise.generators.noisegen.perlin.PerlinNoiseGenerator;
+import de.articdive.jnoise.pipeline.JNoise;
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+class IceRink extends Obstacle {
+    private final JNoise streaks = JNoise.newBuilder()
+        .perlin(PerlinNoiseGenerator.newBuilder().build())
+        .scale(0.15)
+        .build();
+
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point -> {
+            double noise = this.streaks.evaluateNoise(point.blockX(), point.blockZ());
+            Block floor = noise > 0.45 ? Block.BLUE_ICE : noise < -0.55 ? Block.ICE : Block.PACKED_ICE;
+            unit.modifier().setBlock(point.withY(start.blockY()), floor);
+
+            if(relZ(point, start) >= 2 && relZ(point, start) <= 13 && rnd.nextInt(14) == 0) {
+                unit.modifier().setBlock(
+                    point.withY(start.blockY() + 1),
+                    Block.SNOW.withProperty("layers", String.valueOf(1 + rnd.nextInt(2)))
+                );
+            }
+        });
+
+        for(int wallZ : new int[]{5, 10}) {
+            int gapStart = wallZ == 5 ? 1 + rnd.nextInt(4) : 9 + rnd.nextInt(4);
+            for(int x = 0; x < 16; x++) {
+                if(x >= gapStart && x < gapStart + 3) continue;
+                unit.modifier().setBlock(start.add(x, 1, wallZ), Block.PACKED_ICE);
+                unit.modifier().setBlock(start.add(x, 2, wallZ), Block.ICE);
+                if(rnd.nextInt(4) == 0) {
+                    unit.modifier().setBlock(start.add(x, 3, wallZ), Block.SNOW.withProperty("layers", "1"));
+                }
+            }
+        }
+
+        for(int i = 0; i < 5; i++) {
+            int x = rnd.nextInt(16);
+            int z = 2 + rnd.nextInt(12);
+            if(z == 5 || z == 10) continue;
+            unit.modifier().setBlock(start.add(x, 1, z), Block.PACKED_ICE);
+            unit.modifier().setBlock(start.add(x, 2, z), Block.SNOW.withProperty("layers", "1"));
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/LadderWall.java

@@ -0,0 +1,36 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import eu.mhsl.minenet.minigames.world.BlockPallet;
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+class LadderWall extends Obstacle {
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point ->
+            unit.modifier().setBlock(point.withY(start.blockY()), BlockPallet.STONE.rnd()));
+
+        for(int x = 0; x < 16; x++) {
+            boolean hasLadder = rnd.nextInt(3) != 0;
+            for(int y = 1; y <= 3; y++) {
+                for(int z = 7; z <= 8; z++) {
+                    Block block = rnd.nextInt(3) == 0 ? Block.MOSSY_STONE_BRICKS : Block.STONE_BRICKS;
+                    unit.modifier().setBlock(start.add(x, y, z), block);
+                }
+                if(hasLadder) {
+                    unit.modifier().setBlock(start.add(x, y, 6), Block.LADDER.withProperty("facing", "north"));
+                }
+                unit.modifier().setBlock(start.add(x, y, 9), Block.LADDER.withProperty("facing", "south"));
+            }
+
+            if(x % 5 == 2) {
+                unit.modifier().setBlock(start.add(x, 4, 7), Block.LANTERN);
+            }
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/LadderWall2.java

@@ -0,0 +1,48 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import eu.mhsl.minenet.minigames.world.BlockPallet;
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.*;
+
+class LadderWall2 extends Obstacle{
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        forEachColumn(start, point ->
+            unit.modifier().setBlock(point.withY(start.blockY()), BlockPallet.STREET.rnd()));
+
+        this.buildWall(unit, start,4, 4, false);
+        this.buildWall(unit, start,10, 8, true);
+    }
+
+    private void buildWall(GenerationUnit unit, Point start, int z, int height, boolean lastRow) {
+        Random random = new Random();
+        int y = 1;
+        for(int x = 0; x < 16; x++) {
+            for(int wy = 0; wy <= height; wy++) {
+                unit.modifier().setBlock(start.add(x, y + wy, z), BlockPallet.STONE.rnd());
+            }
+        }
+
+        for(int wy = lastRow ? 2 : 0; wy <= height; wy++) {
+
+            Set<Integer> noLadder = new HashSet<>();
+            for(int i = 0; i < 5; i++) {
+                noLadder.add(random.nextInt(16));
+            }
+
+            for(int x = 0; x < 16; x++) {
+                if(!noLadder.contains(x))
+                    unit.modifier().setBlock(start.add(x, y + wy, z - 1), Block.LADDER);
+            }
+
+            if(!lastRow) {
+                for(int x = 7; x < 9; x++) {
+                    unit.modifier().setBlock(start.add(x, y + wy, z + 1), Block.LADDER.withProperty("facing", "south"));
+                }
+            }
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/LeafHedges.java

@@ -0,0 +1,35 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import eu.mhsl.minenet.minigames.world.BlockPallet;
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+class LeafHedges extends Obstacle {
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point -> {
+            unit.modifier().setBlock(point.withY(start.blockY()), Block.GRASS_BLOCK);
+            int z = relZ(point, start);
+            if(z % 4 != 0 && z >= 1 && z <= 14 && rnd.nextInt(10) == 0) {
+                unit.modifier().setBlock(point.withY(start.blockY() + 1), BlockPallet.FLOWER.rnd());
+            }
+        });
+
+        int[] rows = {4, 8, 12};
+        for(int i = 0; i < rows.length; i++) {
+            int gapStart = i % 2 == 0 ? 11 + rnd.nextInt(3) : 1 + rnd.nextInt(3);
+            for(int x = 0; x < 16; x++) {
+                if(x >= gapStart && x < gapStart + 2) continue;
+                Block leaves = (rnd.nextInt(10) < 3 ? Block.FLOWERING_AZALEA_LEAVES : Block.AZALEA_LEAVES)
+                    .withProperty("persistent", "true");
+                unit.modifier().setBlock(start.add(x, 1, rows[i]), leaves);
+                unit.modifier().setBlock(start.add(x, 2, rows[i]), leaves);
+            }
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/MudPools.java

@@ -0,0 +1,40 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import de.articdive.jnoise.generators.noisegen.perlin.PerlinNoiseGenerator;
+import de.articdive.jnoise.pipeline.JNoise;
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+class MudPools extends Obstacle {
+    private final JNoise pools = JNoise.newBuilder()
+        .perlin(PerlinNoiseGenerator.newBuilder().build())
+        .scale(0.11)
+        .build();
+
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point -> {
+            int z = relZ(point, start);
+            double noise = this.pools.evaluateNoise(point.blockX(), point.blockZ());
+            boolean pool = z >= 1 && z <= 14 && noise > 0.05;
+
+            if(pool) {
+                unit.modifier().setBlock(point.withY(start.blockY() - 1), Block.MUD);
+                return;
+            }
+
+            Block floor = noise > -0.3 ? Block.MUDDY_MANGROVE_ROOTS : Block.GRASS_BLOCK;
+            unit.modifier().setBlock(point.withY(start.blockY() - 1), Block.MUD);
+            unit.modifier().setBlock(point.withY(start.blockY()), floor);
+
+            if(z >= 2 && z <= 13 && rnd.nextInt(6) == 0) {
+                unit.modifier().setBlock(point.withY(start.blockY() + 1), Block.MANGROVE_ROOTS);
+            }
+        });
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/Mudpit.java

@@ -0,0 +1,25 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import de.articdive.jnoise.generators.noisegen.perlin.PerlinNoiseGenerator;
+import de.articdive.jnoise.pipeline.JNoise;
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+class Mudpit extends Obstacle {
+    private final JNoise curves = JNoise.newBuilder()
+        .perlin(PerlinNoiseGenerator.newBuilder().build())
+        .scale(0.1)
+        .build();
+
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        forEachColumn(start, point -> {
+            double relative = relZ(point, start);
+            double modifier = -1.5 * Math.cos(relative * Math.PI/7.5) + 1.5;
+            double heightAtBlock = start.blockY() + this.curves.evaluateNoise(point.blockX(), point.blockZ()) * modifier;
+            unit.modifier().setBlock(point.withY(heightAtBlock), Block.SOUL_SAND);
+            unit.modifier().setBlock(point.withY(heightAtBlock-1), Block.SOUL_SAND);
+        });
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/MushroomRoofs.java

@@ -0,0 +1,37 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+class MushroomRoofs extends Obstacle {
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point -> {
+            unit.modifier().setBlock(point.withY(start.blockY()), Block.MYCELIUM);
+            int z = relZ(point, start);
+            if(z >= 1 && z <= 14 && rnd.nextInt(20) == 0) {
+                unit.modifier().setBlock(point.withY(start.blockY() + 1), rnd.nextBoolean() ? Block.RED_MUSHROOM : Block.BROWN_MUSHROOM);
+            }
+        });
+
+        for(int stemZ : new int[]{4, 8, 12}) {
+            int x = 4 + rnd.nextInt(8);
+            Block cap = rnd.nextBoolean() ? Block.RED_MUSHROOM_BLOCK : Block.BROWN_MUSHROOM_BLOCK;
+
+            unit.modifier().setBlock(start.add(x, 1, stemZ), Block.MUSHROOM_STEM);
+
+            for(int capX = x - 3; capX <= x + 3; capX++) {
+                for(int capZ = stemZ - 1; capZ <= stemZ + 1; capZ++) {
+                    if(capX < 0 || capX > 15 || capZ < 0 || capZ > 15) continue;
+                    if(Math.abs(capX - x) == 3 && Math.abs(capZ - stemZ) == 1) continue;
+                    unit.modifier().setBlock(start.add(capX, 2, capZ), cap);
+                }
+            }
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/Obstacle.java

@@ -0,0 +1,69 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import eu.mhsl.minenet.minigames.util.GeneratorUtils;
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+import java.util.concurrent.ThreadLocalRandom;
+import java.util.function.Consumer;
+
+public abstract class Obstacle {
+    public static final int LENGTH = 16;
+
+    @SuppressWarnings("StaticInitializerReferencesSubClass")
+    private static final List<Obstacle> obstacles = List.of(
+        new Mudpit(),
+        new IceRink(),
+        new HoneyField(),
+        new CobwebGrove(),
+        new BerryPatch(),
+        new WaterChannel(),
+        new HayHurdles(),
+        new SlimePatches(),
+        new MudPools(),
+        new PowderSnowField(),
+        new DripstoneSpikes(),
+        new ChorusGrove(),
+        new BasaltPillars(),
+        new WallSlalom(),
+        new LeafHedges(),
+        new MushroomRoofs(),
+        new SandDunes(),
+        new LadderWall(),
+        new LadderWall2(),
+        new GlassPaneWeave(),
+        new BoulderTrench(),
+        new BambooThicket()
+    );
+
+    public abstract void generate(GenerationUnit unit, Point start);
+
+    private static final List<Obstacle> remaining = new ArrayList<>();
+
+    public static synchronized Obstacle getRandomObstacle() {
+        if(remaining.isEmpty()) {
+            remaining.addAll(obstacles);
+        }
+        int index = ThreadLocalRandom.current().nextInt(remaining.size());
+        return remaining.remove(index);
+    }
+
+    protected static void forEachColumn(Point start, Consumer<Point> callback) {
+        GeneratorUtils.foreachXZ(start, start.add(15, 0, LENGTH - 1), callback);
+    }
+
+    protected static int relX(Point point, Point start) {
+        return point.blockX() - start.blockX();
+    }
+
+    protected static int relZ(Point point, Point start) {
+        return point.blockZ() - start.blockZ();
+    }
+
+    protected static Random seededRandom(Point start) {
+        return new Random(start.blockX() * 341873128712L + start.blockZ() * 132897987541L);
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/PowderSnowField.java

@@ -0,0 +1,40 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import de.articdive.jnoise.generators.noisegen.perlin.PerlinNoiseGenerator;
+import de.articdive.jnoise.pipeline.JNoise;
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+class PowderSnowField extends Obstacle {
+    private final JNoise drifts = JNoise.newBuilder()
+        .perlin(PerlinNoiseGenerator.newBuilder().build())
+        .scale(0.14)
+        .build();
+
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point -> {
+            int z = relZ(point, start);
+            int laneX = 7 + (int) Math.round(3 * Math.sin(z * Math.PI / 7.5));
+            boolean onLane = relX(point, start) == laneX || relX(point, start) == laneX + 1;
+            double noise = this.drifts.evaluateNoise(point.blockX(), point.blockZ());
+            boolean drift = z >= 2 && z <= 13 && noise > (onLane ? 0.45 : 0.0);
+
+            unit.modifier().setBlock(point.withY(start.blockY()), onLane ? Block.PACKED_ICE : Block.SNOW_BLOCK);
+
+            if(drift) {
+                unit.modifier().setBlock(point.withY(start.blockY() + 1), Block.POWDER_SNOW);
+                if(noise > 0.6) {
+                    unit.modifier().setBlock(point.withY(start.blockY() + 2), Block.POWDER_SNOW);
+                }
+            } else if(!onLane && rnd.nextInt(6) == 0) {
+                unit.modifier().setBlock(point.withY(start.blockY() + 1), Block.SNOW.withProperty("layers", "1"));
+            }
+        });
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/SandDunes.java

@@ -0,0 +1,41 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import de.articdive.jnoise.generators.noisegen.perlin.PerlinNoiseGenerator;
+import de.articdive.jnoise.pipeline.JNoise;
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+class SandDunes extends Obstacle {
+    private final JNoise dunes = JNoise.newBuilder()
+        .perlin(PerlinNoiseGenerator.newBuilder().build())
+        .scale(0.08)
+        .build();
+
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point -> {
+            double taper = -1.25 * Math.cos(relZ(point, start) * Math.PI / 7.5) + 1.25;
+            double noise = (this.dunes.evaluateNoise(point.blockX(), point.blockZ()) + 1) / 2;
+            int top = start.blockY() + (int) Math.round(noise * taper);
+
+            for(int y = start.blockY() - 1; y < top; y++) {
+                unit.modifier().setBlock(point.withY(y), Block.SANDSTONE);
+            }
+            unit.modifier().setBlock(point.withY(top), Block.SAND);
+
+            if(top > start.blockY() + 1 && rnd.nextInt(14) == 0) {
+                unit.modifier().setBlock(point.withY(top + 1), Block.DEAD_BUSH);
+            } else if(top == start.blockY() && relZ(point, start) >= 2 && relZ(point, start) <= 13 && rnd.nextInt(22) == 0) {
+                int cactusHeight = 1 + rnd.nextInt(2);
+                for(int y = 1; y <= cactusHeight; y++) {
+                    unit.modifier().setBlock(point.withY(top + y), Block.CACTUS);
+                }
+            }
+        });
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/SlimePatches.java

@@ -0,0 +1,31 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import de.articdive.jnoise.generators.noisegen.perlin.PerlinNoiseGenerator;
+import de.articdive.jnoise.pipeline.JNoise;
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+class SlimePatches extends Obstacle {
+    private final JNoise blobs = JNoise.newBuilder()
+        .perlin(PerlinNoiseGenerator.newBuilder().build())
+        .scale(0.18)
+        .build();
+
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point -> {
+            int z = relZ(point, start);
+            boolean slime = z >= 1 && z <= 14 && this.blobs.evaluateNoise(point.blockX(), point.blockZ()) > -0.2;
+            unit.modifier().setBlock(point.withY(start.blockY()), slime ? Block.SLIME_BLOCK : Block.MOSS_BLOCK);
+
+            if(!slime && z >= 2 && z <= 13 && rnd.nextInt(18) == 0) {
+                unit.modifier().setBlock(point.withY(start.blockY() + 1), Block.AZALEA);
+            }
+        });
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/WallSlalom.java

@@ -0,0 +1,38 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+class WallSlalom extends Obstacle {
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point ->
+            unit.modifier().setBlock(point.withY(start.blockY()), rnd.nextInt(4) == 0 ? Block.ANDESITE : Block.STONE));
+
+        int[] rows = {4, 8, 12};
+        for(int i = 0; i < rows.length; i++) {
+            int gapStart = i % 2 == 0 ? 1 + rnd.nextInt(3) : 10 + rnd.nextInt(3);
+
+            boolean[] hasWall = new boolean[16];
+            for(int x = 0; x < 16; x++) {
+                hasWall[x] = x < gapStart || x >= gapStart + 2;
+            }
+
+            for(int x = 0; x < 16; x++) {
+                if(!hasWall[x]) continue;
+                boolean westConnected = x > 0 && hasWall[x - 1];
+                boolean eastConnected = x < 15 && hasWall[x + 1];
+                Block wall = Block.STONE_BRICK_WALL
+                    .withProperty("west", westConnected ? "low" : "none")
+                    .withProperty("east", eastConnected ? "low" : "none")
+                    .withProperty("up", String.valueOf(!westConnected || !eastConnected || x % 4 == 0));
+                unit.modifier().setBlock(start.add(x, 1, rows[i]), wall);
+            }
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/WaterChannel.java

@@ -0,0 +1,37 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+class WaterChannel extends Obstacle {
+    private static final int[] DEPTHS = {0, 1, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 0, 0};
+
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point -> {
+            int depth = DEPTHS[relZ(point, start)];
+            if(depth == 0) {
+                unit.modifier().setBlock(point.withY(start.blockY()), rnd.nextInt(3) == 0 ? Block.SMOOTH_SANDSTONE : Block.SAND);
+                return;
+            }
+
+            Block bottom = rnd.nextInt(5) == 0 ? Block.DARK_PRISMARINE : Block.PRISMARINE;
+            unit.modifier().setBlock(point.withY(start.blockY() - depth), bottom);
+            for(int y = start.blockY() - depth + 1; y <= start.blockY(); y++) {
+                unit.modifier().setBlock(point.withY(y), Block.WATER);
+            }
+
+            if(depth >= 2 && rnd.nextInt(4) == 0) {
+                unit.modifier().setBlock(point.withY(start.blockY() - depth + 1), Block.SEAGRASS);
+            }
+            if(rnd.nextInt(20) == 0) {
+                unit.modifier().setBlock(point.withY(start.blockY() + 1), Block.LILY_PAD);
+            }
+        });
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/spaceSnake/SpaceSnake.java

@@ -110,7 +110,7 @@ public class SpaceSnake extends StatelessGame {
             playerMoveEvent.getPlayer().teleport(this.getSpawn());
             playerMoveEvent.getPlayer().setGameMode(GameMode.SPECTATOR);
             long livingPlayers = this.getPlayers().stream()
-                .filter(p -> this.getScore().hasResult(p))
+                .filter(p -> !this.getScore().hasResult(p))
                 .count();
             if(livingPlayers == 1) this.setTimeLimit(10);
             if(livingPlayers == 0) this.stop();
@@ -125,7 +125,7 @@ public class SpaceSnake extends StatelessGame {
         }
 
         PlayState state = this.playerStates.get(playerBlockPlaceEvent.getPlayer());
-        state.blocks.add(playerBlockPlaceEvent.getBlockPosition().asVec().asPosition());
+        state.blocks.add(new Pos(playerBlockPlaceEvent.getBlockPosition()));
         state.cutToLength(pos -> this.setBlock(pos, Block.AIR));
 
         MinecraftServer.getSchedulerManager().scheduleNextTick(() -> this.updateInv(playerBlockPlaceEvent.getPlayer()));