diff --git a/README.md b/README.md
index 83a70ad..ba4741e 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,8 @@
 This Minecraft mod allows you to prevent the world generator from generating new chunks past a defined limit.  
 You can set the limit by changing the gamerule `chunkGenerationLimit`.
 
+This mod also adds an alternative ending. You can turn this off with `/gamerule truncatedAlternativeEnding false`.
+
 Requires Fabric API!
 
 ## Known Incompatibilities
diff --git a/src/main/java/net/chaoticbyte/truncated/PlayerReachedLimitCriterion.java b/src/main/java/net/chaoticbyte/truncated/PlayerReachedLimitCriterion.java
new file mode 100644
index 0000000..bd1c983
--- /dev/null
+++ b/src/main/java/net/chaoticbyte/truncated/PlayerReachedLimitCriterion.java
@@ -0,0 +1,35 @@
+package net.chaoticbyte.truncated;
+
+import com.mojang.serialization.Codec;
+import net.minecraft.advancement.criterion.AbstractCriterion;
+import net.minecraft.predicate.entity.LootContextPredicate;
+import net.minecraft.predicate.entity.LootContextPredicateValidator;
+import net.minecraft.server.network.ServerPlayerEntity;
+
+import java.util.Optional;
+
+public class PlayerReachedLimitCriterion extends AbstractCriterion<PlayerReachedLimitCriterion.Conditions> {
+
+    public void trigger(ServerPlayerEntity player) {
+        this.trigger(player, conditions -> true);
+    }
+
+    // practically unnecessary boilerplate:
+
+    @Override
+    public Codec<Conditions> getConditionsCodec() {
+        return PlayerReachedLimitCriterion.Conditions.CODEC;
+    }
+
+    public record Conditions() implements AbstractCriterion.Conditions {
+        public static final Codec<PlayerReachedLimitCriterion.Conditions> CODEC = Codec.unit(new PlayerReachedLimitCriterion.Conditions());
+
+        @Override
+        public void validate(LootContextPredicateValidator validator) {}
+
+        @Override
+        public Optional<LootContextPredicate> player() {
+            return Optional.empty();
+        }
+    }
+}
diff --git a/src/main/java/net/chaoticbyte/truncated/Truncated.java b/src/main/java/net/chaoticbyte/truncated/Truncated.java
index 98e5d52..8454232 100644
--- a/src/main/java/net/chaoticbyte/truncated/Truncated.java
+++ b/src/main/java/net/chaoticbyte/truncated/Truncated.java
@@ -3,21 +3,43 @@ package net.chaoticbyte.truncated;
 import net.fabricmc.api.ModInitializer;
 
 import net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents;
+import net.fabricmc.fabric.api.event.lifecycle.v1.ServerTickEvents;
 import net.fabricmc.fabric.api.gamerule.v1.GameRuleFactory;
 import net.fabricmc.fabric.api.gamerule.v1.GameRuleRegistry;
+import net.minecraft.advancement.criterion.Criteria;
 import net.minecraft.server.MinecraftServer;
+import net.minecraft.util.math.Vec3d;
 import net.minecraft.world.GameRules;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import java.util.ArrayList;
+
 public class Truncated implements ModInitializer {
 	public static final String MOD_ID = "truncated";
-	public static final GameRules.Key<GameRules.IntRule> CHUNK_GEN_LIMIT_KEY = GameRuleRegistry.register(
-			"chunkGenerationLimit", GameRules.Category.MISC, GameRuleFactory.createIntRule((28_000_000 / 16) - 1 ));
 	public static final Logger LOGGER = LoggerFactory.getLogger(MOD_ID);
 
+	// gamerules
+	public static final GameRules.Key<GameRules.IntRule> CHUNK_GEN_LIMIT_KEY = GameRuleRegistry.register(
+			"chunkGenerationLimit",
+			GameRules.Category.MISC,
+			GameRuleFactory.createIntRule((28_000_000 / 16) - 1 )
+	);
+	public static final GameRules.Key<GameRules.BooleanRule> TRUNCATED_ALT_ENDING = GameRuleRegistry.register(
+			"truncatedAlternativeEnding",
+			GameRules.Category.MISC,
+			GameRuleFactory.createBooleanRule (true)
+	);
+
+	// advancement criterion
+	public static PlayerReachedLimitCriterion PLAYER_REACHED_LIMIT = Criteria.register(
+			MOD_ID + "/reached_limit",
+			new PlayerReachedLimitCriterion());
+
+	// variable temporary holding the server reference later
 	private static MinecraftServer server;
 
+	// get the limit set by the gamerule
 	public static int getLimit() {
 		return server.getGameRules().getInt(CHUNK_GEN_LIMIT_KEY);
 	}
@@ -27,6 +49,30 @@ public class Truncated implements ModInitializer {
 		ServerLifecycleEvents.SERVER_STARTING.register(minecraftServer -> {
 			server = minecraftServer;
 		});
+		ServerTickEvents.START_WORLD_TICK.register(minecraftServer -> {
+			if (minecraftServer.getGameRules().getBoolean(TRUNCATED_ALT_ENDING)) {
+				float currentBlockLimit = getLimit() * 16;
+				java.util.List<net.minecraft.server.network.ServerPlayerEntity> playerEntitiesReachedEnd = new ArrayList<>();
+				minecraftServer.getPlayers().forEach(playerEntity -> {
+					if (!playerEntity.isSpectator()) {
+						Vec3d playerPos = playerEntity.getPos();
+						if (
+								playerPos.x > currentBlockLimit + 16
+										|| playerPos.x < -currentBlockLimit
+										|| playerPos.z > currentBlockLimit + 16
+										|| playerPos.z < -currentBlockLimit
+						) {
+							playerEntitiesReachedEnd.add(playerEntity);
+						}
+					}
+				});
+				// trigger the end credits for all players out of bounds
+				playerEntitiesReachedEnd.forEach(playerEntity -> {
+					PLAYER_REACHED_LIMIT.trigger(playerEntity); // trigger advancement
+					playerEntity.detachForDimensionChange();    // end credits
+				});
+			}
+		});
 	}
 
 }
\ No newline at end of file
diff --git a/src/main/resources/data/minecraft/advancement/truncated/alternative_ending.json b/src/main/resources/data/minecraft/advancement/truncated/alternative_ending.json
new file mode 100644
index 0000000..5076d7d
--- /dev/null
+++ b/src/main/resources/data/minecraft/advancement/truncated/alternative_ending.json
@@ -0,0 +1,22 @@
+{
+  "parent": "minecraft:story/root",
+  "criteria": {
+    "reached_limit": {"conditions": {}, "trigger": "minecraft:truncated/reached_limit"}
+  },
+  "display": {
+    "announce_to_chat": true,
+    "description": {
+      "text": "You have traveled beyond the natural limits of this world (alternative ending)"
+    },
+    "frame": "goal",
+    "hidden": false,
+    "icon": {
+      "id": "minecraft:compass"
+    },
+    "title": {
+      "text": "The Limits of this World"
+    },
+    "show_toast": true
+  },
+  "requirements": [["reached_limit"]]
+}
\ No newline at end of file