Radiach
by btxdxd
Radiach adds a radiation layer to survival play, where sunlight and exposure wear down the player and a worn suit must be kept repaired.
What it does
During the day the sun's rays pass through the sky and expose players to dangerous levels of radiation, and the longer a player stays exposed the faster radiation builds up in the body. Shelter comes from going underground or building structures out of materials that absorb radiation. Different blocks absorb it at different rates: leaves give 3% absorption, iron 100% and obsidian 90%, so the choice of building material matters. Radiach requires Curios API and Geckolib, and Just Enough Items (JEI) and Sable are optional extras.
A radiation suit is the main protection and has several stats to watch. Physical impacts and time both damage it, and once its seal integrity falls below a threshold radiation begins leaking in, so the seal needs upgrades to lower that threshold. Overheating also damages the suit and lowers its durability faster, which cooling packs and coolant cartridges help manage. Repairs add wear, and a suit at maximum wear can only be fixed after a wear repair kit is used.
The mod is published for Forge and NeoForge. Files exist for 1.20.1 and 1.21.1, and the latest files are 1.04.0 for 1.20.1 on Forge and 2.0.0 for 1.21.1 on NeoForge. Every player and the server need a copy of the mod. Radiach is released under All rights reserved and is not open source.
Key features
Radiation exposure
Sunlight during the day raises radiation in the body, and the amount depends on how exposed the player is.
Absorbing blocks
Blocks absorb radiation at different rates, so shelter built from dense materials gives better protection.
Radiation suit
A suit tracks seal integrity, damage from time and impacts, heat and wear, and must be kept repaired.
Seal upgrades
Upgrading the seal lowers the integrity threshold at which radiation starts leaking into the suit.
Heat management
Cooling packs and coolant cartridges control temperature, since overheating shortens the suit's durability.
Wear and repair
Each repair adds wear, and a suit at maximum wear needs a wear repair kit before it can be repaired again.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
How it compares
TPoNR Core is a Forge-only mod for 1.20.1 with the client and server environment and is released under All rights reserved, so it does not run on NeoForge. Radiation is server-side only, so players join without installing it, and it covers Forge and NeoForge for 1.20.1 – 1.21.8. L2 Hostility is open source under the GNU Lesser General Public License v2.1 only and runs on client and server for 1.20.1 – 1.21.1 on Forge and NeoForge.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Radiach | Forge and NeoForge | 1.20.1 – 1.21.1 | Client and server | 2026-08-22 |
| TPoNR Core | Forge | 1.20.1 | Client and server | 2025-10-23 |
| Radiation | Forge and NeoForge | 1.20.1 – 1.21.8 | Server-side only | 2026-03-07 |
| L2 Hostility | Forge and NeoForge | 1.20.1 – 1.21.1 | Client and server | 2026-03-26 |
Questions
Does Radiach need Curios API?
Do players and the server both need Radiach?
Which loaders and versions are supported?
In the catalog
Radiach is one of 17,631 Equipment mods on ModsFinder, and one of 9,216 Equipment mods for Forge. 32,366 mods support Minecraft 1.21.1.
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What the author says
Welcome to Radiach, a radiation survival mod that brings a new layer of challenge to Minecraft. Step into a world where the sun is your greatest enemy, and the only thing standing between you and a slow, agonizing death is a suit that needs constant attention and upgrades. The world of Minecraft has become a harsh…
Official listing
- Modrinth page
- modrinth.com/mod/radiach
- Owner
- btxdxd
- Published
- 2025-02-23
- Updated on Modrinth
- 2026-08-22
- Facts verified
- 2026-10-15