Thermonuclear Expansion Addon transforms late-game survival into a realistic, hardcore nuclear tech grind. Instead of simple “mega TNT,” players must mine uranium (from redstone), refine it, build risky reactors for plutonium transmutation, craft hazmat gear, and assemble atomic bombs or thermonuclear missiles. No experimental features required, but reactors can melt down/explode if not waterlogged, and materials cause radiation damage.
Screenshots:
Installation Note:
- You do not need to enable the Experimental Settings.
Thermonuclear Expansion Addon Download Links
For Minecraft PE/Bedrock v26+, 1.21+
mcaddon: Download from Server 1 – Download from Server 2
Quick facts
- Edition: Minecraft Bedrock
- File type: .mcpack or .mcaddon
- Minecraft version listed: 1.21
- How to install: Download the .mcpack or .mcaddon file. → Open it — Minecraft imports it. → In your world: Behavior Packs → Available → Activate, then the same under Resource Packs.
- Where to get it: In MCModsHub, or directly above on this page.
Install steps are the general flow for this file type — How to install Minecraft Bedrock addons & mods walks through it step by step.
Verified by MCModsHub
- Pack type: .mcaddon — behaviour and resource pack in one file
- Manifest requires Minecraft 1.21.90 or newer
- Complete pack — everything it depends on is inside the file
- Download size: 6.7 MB
- Download link checked 17 Jun 2026 — working
- Mirrored on our own servers — the download does not depend on the original host
These come from our own check of the pack file, not from the source page.