Contamination

Contamination

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

by
12.3K Downloads
neoforgeequipmentgame-mechanicsworldgen
Rent Server with this Mod

Screenshots

Spreader Bossfight
An assimilated landscape
Huggers latching onto the player
A Radiation Suppressor
Upgrades
Something that used to be a forest

About this Mod

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!

Available Versions

Contamination 2.3.6 - NeoForge 1.21.1release
MC 1.21.1neoforge
July 27, 2026
Contamination 2.3.5 - NeoForge 1.21.1release
MC 1.21.1neoforge
July 23, 2026
Contamination 2.3.4 - NeoForge 1.21.1release
MC 1.21.1neoforge
July 22, 2026
Contamination 2.3.3 - NeoForge 1.21.1release
MC 1.21.1neoforge
July 20, 2026
Contamination 2.3.2 - NeoForge 1.21.1release
MC 1.21.1neoforge
July 20, 2026

How to Install Contamination on Your Server

1

Order Server

Order a Minecraft Java server with at least 4 GB RAM (6 GB recommended).

2

Set neoforge Loader

In the panel under "Egg", select the neoforge loader and matching Minecraft version (1.21.1).

3

Install Mod

Open the mod browser in the dashboard and search for "Contamination". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

neoforge

Minecraft Versions

1.21.1

Server-side

Required

Recommended RAM

6 GB(min. 4 GB)

Frequently Asked Questions

Contamination server crashes on startup – what to do?

Most common cause: wrong neoforge version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 4 GB RAM is allocated and the loader matches the mod version (1.21.1). You can switch loaders with one click in the panel.

Is Contamination compatible with neoforge?

Contamination officially supports neoforge for Minecraft 1.21.1. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Contamination – how to optimize performance?

Recommended RAM: 6 GB (per 5 players). Use /spark profiler to check if Contamination consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.

Rent Modded Server

Install Contamination with just one click on your server.

Recommended RAM
6 GBfrom €7.800000000000001/mo
Minimum 4 GB | per 5 players
Create Server Now
1-Click Mod Install
NVMe SSD Storage
DDoS Protection included

Details

License
MIT License
Server-side
Required

Supported Versions

1.21.1