Alexy's Radiation Lib
by AstralOreo
Alexy's Radiation Lib is a Forge library for 1.20.1 that adds a configurable radiation system inspired by the STALKER and Stalcraft games, with zones, emissions and dose tracking.
What it does
Radiation is handled by the mod's engine, which tracks zones, emissions and the dose a player accumulates. Zones are synchronized to clients automatically in multiplayer, and damage is decided by the server, so the server stays authoritative over what a player receives. Commands let admins manage zones, bunkers, emissions and doses.
The mod exposes a KubeJS API facade with events for emission phases, death by radiation and zone entry and exit. Scripts can change loot, quests, automatic emissions and zone gating, and balance values are left to the config. Curios API is required, so install it alongside the library on Forge 1.20.1, and KubeJS is optional for scripting.
Alexy's Radiation Lib runs on client and server, so the server and every player need it. Files are published for Forge 1.20.1 only, and the code is licensed under the MIT License, which means it is not open source.
Key features
Configurable radiation system
A radiation engine with zones and damage that can be tuned through the config file to suit a modded server.
Server-authoritative damage
The server decides radiation damage and syncs zone state to clients, so multiplayer players see the same zones.
KubeJS scripting hooks
Events for emission phases, radiation death and zone enter and exit let scripts change loot, quests and zone gating.
Admin commands
Commands manage zones, bunkers, emissions and doses, and players can press ALT+Z to view the zone they are in.
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
Optional 1
Use cases
Modded survival servers
Server admins who want a radiation system in a modded server can configure zones, emissions and dose limits, then script the rest with KubeJS.
Who it’s for: Server owners and modpack builders who want a configurable radiation system on Forge 1.20.1, with multiplayer syncing and scripting hooks for loot and quests.
How it compares
Anomaly Zone is a Forge 1.20.1 mod for client and server under the MIT License, but it is not open source. X-ray Radiation is also a client and server Forge 1.20.1 mod, under the Apache License 2.0. areamonitor is the one server-side only option, released under the MIT License and open source, so players can join without installing anything.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Alexy's Radiation Lib | Forge | 1.20.1 | Client and server | 2026-08-07 |
| Anomaly Zone | Forge | 1.20.1 | Client and server | 2026-08-28 |
| X-ray Radiation | Forge | 1.20.1 | Client and server | 2026-05-16 |
| areamonitor | Forge | 1.20.1 | Server-side only | 2026-07-10 |
Questions
Does Alexy's Radiation Lib need Curios API?
Does the server need the mod?
Is KubeJS needed?
In the catalog
Alexy's Radiation Lib is one of 8,016 Management mods on ModsFinder, and one of 2,698 Management mods for Forge. 34,764 mods support Minecraft 1.20.1.
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What the author says
RadioLib is a STALKER/Stalcraft-inspired radiation system for Forge 1.20.1. It is not plug-and-play: it needs configuring, and is aimed at server admins who want a radiation system on a modded server. The mod is the engine (radiation, zones, damage, sync); the content (loot, quests, balance) is left to you, via…
Official listing
- Modrinth page
- modrinth.com/mod/radiation-lib
- Owner
- AstralOreo
- Published
- 2026-08-05
- Updated on Modrinth
- 2026-08-07
- Facts verified
- 2026-10-15