Underfoot TNT Addon

A chaotic Minecraft Bedrock minigame where the ground beneath your feet turns into TNT in real time. Keep moving, or watch the world blow up around you.

Features

• Underfoot TNT conversion: Every tick, the block beneath each participant's feet transforms into a TNT block. Half-blocks (slabs, trapdoors, doors, fences, fence gates, carpets, etc.) are placed at the player's feet level instead.
• Damage = Explosion: Taking damage from a mob or from another TNT explosion spawns a primed TNT at your location — creating brutal chain reactions.
• Smart block preservation: Water, lava, obsidian, bedrock, end portal frame, beds, portals are protected by default. Creative-only blocks (barrier, command_block, structure_void, etc.) are permanently protected.
• Toggle protection categories: In the settings menu, you can turn off protection for water / lava / obsidian / bedrock / end portal frame / bed / end portal / nether portal individually.
• Terrain destruction ON / OFF: Optional toggle to prevent explosions from breaking terrain (great for arena play).
• TNT drops blocked: Breaking a TNT block by hand or via explosion does not drop the TNT item.
• Bilingual UI: Switch between Japanese and English in-game via the settings menu or /tnt:lang_ja / /tnt:lang_en commands.
• Countdown intro: 3-2-1-START with sound and title effects.
• Custom completion sound: Java-style achievement sound on game end.
• JSON UI background: Custom menu screen with background art (marker-based server_form override, won't affect other ActionForms).

Commands

Command	Permission	Description
/tnt:start	GameDirectors	Start the game (all online players join, 3s countdown)
/tnt:stop	GameDirectors	Stop the game
/tnt:menu	Any	Open the main menu (start/stop/participant select/settings)
/tnt:join	Any	Join the game (yourself)
/tnt:leave	Any	Leave the game (yourself)
/tnt:lang_ja	GameDirectors	Switch UI language to Japanese
/tnt:lang_en	GameDirectors	Switch UI language to English

How to Play

1. Apply both Behavior Pack and Resource Pack to your world.
2. Make sure Beta API is enabled in world settings (uses @minecraft/server 2.7.0).
3. Run /tnt:start or open the menu and press "Start". Players have a 3-second countdown to position themselves.
4. Keep moving! The block you stand on turns into a TNT block.
5. Run /tnt:stop to end the game and play the completion sound.

Requirements

• Minecraft Bedrock Edition v1.21.0 or later (recommended: v1.26.0+ for Script API 2.7.0)
• Holiday Creator Features (Beta API): enable in world settings
• Both BP and RP must be applied together

Tested On

• Minecraft Bedrock Windows 10/11 v1.26.x
• Multiplayer with 2-4 players

Languages

• 日本語 (Japanese)
• English

Credits

• Code & Design: mirinhoshi

License

(C) 2026 みりん (mirinhoshi). All rights reserved.

Distribution terms apply: https://mirin-brog.com/distribution-terms/

• ✅ Personal use, server use, video & streaming OK
• ✅ Modify for personal use
• ❌ Redistribution / repackaging / reupload without permission
• ❌ Selling or monetized redistribution

Links

• Author X / Twitter: @Onimirin
• Blog: mirin-brog.com
• Distribution terms: mirin-brog.com/distribution-terms

Changelog

v2.0.0 (2026-05-24)

• Full rewrite to pure Script API (mcfunction removed)
• New: settings UI with per-block protection toggles
• New: bilingual (JA/EN) support
• New: JSON UI background art (marker-based server_form override)
• New: 3-2-1-START countdown with sound effects
• New: damage from TNT explosions also triggers cascade
• New: /tnt:join, /tnt:leave, /tnt:lang_ja, /tnt:lang_en commands
• Improved: explosion item drops are auto-cleaned