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ContaminationMinecraft mod for 1.21.1

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

client and servernewest supported 1.21.1TechnologyMobsEquipmentGame Mechanics
Latest version
2.3.6
Minecraft
1.21.1
Java
Java 21+
Loader
NeoForge
Licence
MIT
Downloads
12.3k
Updated
2 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Contamination servers

One click and Contamination is installed with the right loader, on hardware built for it.

  • 1.21.1
  • NeoForge
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Screenshots

Click a screenshot to open it. Screenshots are served from the author’s own host and belong to them.

Minecraft versions

Every version Contamination declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1NeoForge21+declared8 Aug 2024

Download

From Contamination’s own host. Nothing is re-hosted here.

2.3.6release27 Jul 2026

contamination-2.3.6-1.21.1.jar · 66.1 MB · for 1.21.1

Download latest
29ca78d10d40…
Older versions15
  • 2.3.523 Jul 20261.21.166.1 MB30 downloadsab60f795b88b…Get
  • 2.3.422 Jul 20261.21.166.1 MB30 downloadscdfb9578a6c4…Get
  • 2.3.320 Jul 20261.21.166.1 MB36 downloadsd66189a0f926…Get
  • 2.3.220 Jul 20261.21.166.1 MB12 downloads940ef5392843…Get
  • 2.319 Jul 20261.21.166.1 MB15 downloads6acb9c84426a…Get
  • 2.1.31 Jan 20261.21.139.4 MB9.0k downloads51fec26b8f9f…Get
  • 2.1.121 Dec 20251.21.139.4 MB1.8k downloadsa4ef14be94ef…Get
  • 2.121 Dec 20251.21.139.4 MB94 downloadsfac76ea63996…Get
  • 2.0.19 Dec 20251.21.115.0 MB107 downloads736dd58fc647…Get
  • 2.08 Dec 20251.21.115.0 MB58 downloads6dff92085069…Get
  • 1.421 Nov 20251.21.15.0 MB61 downloads25b0e5bb1b8c…Get
  • 1.321 Nov 20251.21.15.0 MB27 downloads8bc640fedc73…Get
  • 1.229 Aug 20251.21.15.0 MB463 downloadsd84e7ae524e2…Get
  • 1.123 Aug 20251.21.13.6 MB278 downloadsa3a500cfb9fb…Get
  • 1.021 Aug 20251.21.13.6 MB123 downloads791914c3d2f2…Get

Frequently asked

Does Contamination work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version Contamination declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Do I need to install Contamination on the client or the server?

Both. Every player needs it installed and so does the server, so anyone joining without it will be refused.

Which platform or loader does Contamination support?

NeoForge. A build for one platform or loader will not necessarily load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for Contamination?

On the newest Minecraft version it supports, Java 21 or newer. The requirement comes from the Minecraft version you run rather than from the mod itself, so on an older supported Minecraft the answer is that version's Java, not this one.

What licence is Contamination under?

MIT, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install Contamination?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the mod and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.

Where do I download Contamination safely?

Start with the author's page on Modrinth, which is where the data here is synced from. MCReference does not host or repackage files. The download link goes to the source recorded for that release; verify the publisher, filename and checksum before running it.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

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Details from Modrinth, where the author last updated it on 27 Jul 2026. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

Is this information wrong or missing something? .