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Contamination

The world is ending, the air fills with deafening silence. Can you survive?

NeoForge
Loaders
NeoForge
Downloads on Modrinth
12.8K
Followers on Modrinth
32
versions
16
Updated
July 27, 2026Jul 27
Published
in 2025
An assimilated landscape · swipe

At a glance

Runs on NeoForge
For Minecraft 1.21.1
Needed in the game and on the server
Latest version — 2.3.6 from July 27, 2026
Requires Curios API and Geckolib
License MIT — free
Where it's needed
In gamerequiredOn serverrequired

Needed both in the game and on the server

Game versions1.21.1

Welcome to Contamination!

Welcome to "Contamination" (previously known as "Irradiation")! This mod will turn your world into a contaminated wasteland in which you'll have to try and survive.

The contamination is split in stages, progressing as you survive. There are 3 world contamination stages:

- Stage I: Vegetation begin to decay under the influence of contamination. If any creature is not within a safe zone or not wearing a Hazmat Suit, it dies. Contaminated mobs spawn.

- Stage II: Contaminated mobs become stronger. Vegetation decays faster. Elite contamianted mobs gain the ability spawn.

- Stage III: Vegetation decays very fast. Contaminated mobs become stronger. The Spreader gains the ability to spawn.

How to survive

In order to survive, you need to craft 2 things: a Particle Suppressor and a Suit Workstaion

Your Hazmat Suit (which is given you when you start the world) can be charged with RE (resonant energy)-rich items at the Suit Workstation. As long as suit's charge is above 0, you can walk around freely in the contaminated particles.

Particle Suppressor does exactly what the name suggests - it allows normal mobs to spawn and survive in it's radius as long as it's powered by RE. It can also be upgraded with suppressor upgrades. They can increase suppressor's radius, efficiency or fuel capacity.

A Suit Workstation is used to upgrade and charge your suit. You need suit upgrades to increase suit's contamination resistance or charge capacity.

With all that said, make sure to stock up on RE-rich items! They are vital for your survival. Running out of them can cost you your world as you can get stuck in an infinite death loop, which can be broken only by entering creative mode!

You might wonder: "How am I supposed to breed animals"? Well, Entity Arranger is there to help you! It uses RE and DNA samples in order to clone a random animal (or a villager).

Of course scavenging for RE-rich items will get annoying. For that reason, Particle Permutator exists! It consumes various fuels in order to create redstone, which is an RE-rich item itself.

Structures

Custom structures may be found in the world with exclusive loot. Be warned though: these structures usually have a higher contamination level, meaning going into them unprepared is a death sentance!

Configs

Want to experience the legacy progression? Is something too fast or too slow? Or do you just want to change the fog's colors? In that case, this mod can be configured via configs.

Additional notes

This mod REQUIRES GeckoLib and Curios API!

FAQ

How to install Contamination?

Install NeoForge for your Minecraft version, download Contamination for the same version and loader, put the file into the mods folder and launch the game with the loader profile.

Which Minecraft versions does Contamination support?

Contamination has builds for Minecraft 1.21.1.

Is Contamination needed on the server?

Needed in the game and on the server

License and source
MIT Licensefree to use and share with credit to the author
Original — Modrinth↗Files unchanged, verified with SHA-512Is this your mod? For rights holders

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