ChunkEcho

The world copies everything you do.

ChunkEcho is a chaotic co-op minigame plugin. Once the match starts, every block you place or break — along with doors, buttons, trapdoors, crops, TNT, item frames, paintings, buckets and fire — is instantly mirrored onto the same chunk-local coordinates in every other loaded chunk of the world. Build a house in your chunk, and identical houses pop up everywhere else players have explored. Light TNT near your base, and it detonates in everyone else's base too.

Built for small groups of friends who spread far apart and must survive the consequences of each other's actions.

How it works

• The world starts in a frozen lobby: players can't move, build, interact, or take damage until an operator starts the match.
• An operator runs /start. Players are:
  • Spread across the map on a circle, guaranteed at least 10,000 blocks apart from each other (spawn Y is the highest safe block).
  • Unfrozen, with a title, sound cue, and chat announcement.
• From that point on, the duplication mechanic is active — only in currently loaded chunks, so there's no lag from forcing chunks to load.

What gets duplicated

• Placing and breaking blocks
• Doors, trapdoors, fence gates, buttons, levers
• Planting and harvesting crops (wheat, carrots, sweet berries, cocoa, etc.)
• Primed TNT (same fuse time, explodes everywhere at once)
• Player-built iron golems
• Item frames, glow item frames, and paintings
• Placing/collecting fluids with buckets
• Fire ignition

Commands & Permissions

Requirements

• Paper (or a Paper fork) 1.20.1+
• No dependencies, no configuration needed — just drop in the jar

Notes

• Designed for small servers/private groups playing together, not large public survival servers.
• Duplication only touches loaded chunks by design, to keep performance predictable regardless of world size.