mod
Outbreak: Apocalyptic Bioweapons | Killing Floor | Left 4 DeadMinecraft mod for 1.21.1
Brutal, gruesome, and challenging. An outbreak of failed bioweapons invades your world. Currently Added: Killing Floor
- Latest version
- outbreak_kf-1.1.0-neoforge-1.21.1.jar
- Minecraft
- 1.20.1 to 1.21.1
- Java
- Java 21+
- Loaders
- NeoForge, Forge
- Licence
- not stated
- Downloads
- 102.0k
- Updated
- 15 d ago
- Available on
- CurseForge
PartnerHost Outbreak: Apocalyptic Bioweapons | Killing Floor | Left 4 Dead servers
One click and Outbreak: Apocalyptic Bioweapons | Killing Floor | Left 4 Dead is installed with the right loader, on hardware built for it.
- 1.21.1
- NeoForge
- Forge
- One click mod install
- Loader matched for you
- Ryzen CPUs
- NVMe SSD
Screenshots
Click a screenshot to open it. Screenshots are served from the author’s own host and belong to them.
Minecraft versions
Every version Outbreak: Apocalyptic Bioweapons | Killing Floor | Left 4 Dead declares support for, newest first, with the Java runtime that version needs.
Download
From Outbreak: Apocalyptic Bioweapons | Killing Floor | Left 4 Dead’s own host. Nothing is re-hosted here.
All 30 releasesoutbreak_kf-1.1.0-neoforge-1.21.1.jar · 6.1 MB · for 1.21.1
603043a11428…Older versions24Hide older versions
- outbreak_kf-1.1.0-forge-1.20.1.jar22 Jul 20261.20.16.1 MB
ba76ef6c6319…Get - outbreak_kf-1.0.4-forge-1.20.1.jar30 Apr 20261.20.15.8 MB1 downloads
0ce5bcf88f55…Get - outbreak_kf-1.0.4-neoforge-1.21.1.jar30 Apr 20261.21.15.8 MB1 downloads
f4122472dfa7…Get - outbreak_kf-1.0.3.2-neoforge-1.21.1.jar27 Feb 20261.21.15.7 MB1.4k downloads
c1b3a7e291b6…Get - outbreak_kf-1.0.3.2-forge-1.20.1.jar27 Feb 20261.20.15.8 MB369 downloads
c50dfbc60fa4…Get - outbreak_kf-1.0.3.1-hotfix-neoforge-1.21.1.jar9 Feb 20261.21.15.7 MB481 downloads
3bc148c539d6…Get - outbreak_kf-1.0.3.1-hotfix-forge-1.20.1.jar9 Feb 20261.20.15.8 MB
8fcf5c21a87b…Get - outbreak_kf-1.0.3-neoforge-1.21.1.jar8 Feb 20261.21.15.7 MB46 downloads
62ac10bd115e…Get - outbreak_kf-1.0.3-forge-1.20.1.jar8 Feb 20261.20.15.8 MB
2dc2f1845087…Get - outbreak_kf-1.0.2.2-forge-1.20.1.jar21 Jan 20261.20.15.6 MB150 downloads
1f198b06855b…Get - outbreak_kf-1.0.2.2-neoforge-1.21.1.jar21 Jan 20261.21.15.6 MB
94a278ab881e…Get - outbreak_kf-1.0.2.1-forge-1.20.1.jar8 Jan 20261.20.15.6 MB93 downloads
1353737d90dd…Get - outbreak_kf-1.0.2.1-neoforge-1.21.1.jar8 Jan 20261.21.15.5 MB
618336d02d06…Get - outbreak_kf-1.0.2-neoforge-1.21.1.jar4 Jan 20261.21.15.5 MB19 downloads
e012fe8a3c42…Get - outbreak_kf-1.0.2-forge-1.20.1.jar4 Jan 20261.20.15.6 MB
6c617c2c63f6…Get - outbreak_kf-1.0.1-neoforge-1.21.1.jar20 Dec 20251.21.15.5 MB29 downloads
d533313f4801…Get - outbreak_kf-1.0.1-forge-1.20.1.jar20 Dec 20251.20.15.5 MB
f53be0e2c485…Get - outbreak_kf-1.0.0-neoforge-1.21.1.jar17 Dec 20251.21.15.0 MB23 downloads
c97f4da25198…Get - outbreak_kf-1.0.0-forge-1.20.1.jar17 Dec 20251.20.15.0 MB
ed00bc454bc9…Get - outbreak_kf-0.9.9-neoforge-1.21.1.jar9 Dec 20251.21.14.4 MB89 downloads
f21594e08f5e…Get - outbreak_kf-0.9.9-forge-1.20.1.jar9 Dec 20251.20.14.4 MB2 downloads
5febca278b77…Get - outbreak_kf-0.9.8-forge-1.20.1.jar7 Dec 20251.20.13.3 MB124 downloads
5b897f4cddef…Get - outbreak_kf-0.9.7-forge-1.20.1.jar4 Dec 20251.20.13.2 MB106 downloads
6c59d4d91144…Get - outbreak_kf-0.9.6-forge-1.20.1.jar3 Dec 20251.20.12.8 MB35 downloads
a181756a729d…Get
Frequently asked
Does Outbreak: Apocalyptic Bioweapons | Killing Floor | Left 4 Dead work on Minecraft 1.21.1?
Yes. 1.21.1 is the newest Minecraft version Outbreak: Apocalyptic Bioweapons | Killing Floor | Left 4 Dead declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.
Which Minecraft versions does Outbreak: Apocalyptic Bioweapons | Killing Floor | Left 4 Dead support?
Everything the author has declared, from 1.20.1 up to 1.21.1. The full list is in the table above, with the Java runtime each version needs next to it.
Which loader does Outbreak: Apocalyptic Bioweapons | Killing Floor | Left 4 Dead need?
NeoForge, Forge. A build for one loader will not load on another, so this is the first thing to check before the Minecraft version.
Which Java version do I need for Outbreak: Apocalyptic Bioweapons | Killing Floor | Left 4 Dead?
Java 21 or newer, because that is what the newest Minecraft release it supports requires. The requirement comes from the game rather than from the mod itself.
How do I install Outbreak: Apocalyptic Bioweapons | Killing Floor | Left 4 Dead?
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 Outbreak: Apocalyptic Bioweapons | Killing Floor | Left 4 Dead safely?
From the author's own page on CurseForge, which is where the data here is synced from. MCReference never mirrors, re-hosts or repackages a file: every download button points at the original source, so you get exactly what the author published.
Works on the same versions
Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.
Is this information wrong or missing something? .