CurseForge · Minecraft mod
Mutationcraft
Adds new terrifying parasite mutant creatures into the game!
Quick answer
Which Mutationcraft release should I use?
mutationcraft-legacy-neoforge-1.1-1.21.1.jar targets 1.21.1 with NeoForge. The project page does not say whether this file belongs on the client, dedicated server, or both. All 1 required mods have matching files.
Where it goes
Is Mutationcraft required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does mutationcraft-legacy-neoforge-1.1-1.21.1.jar need?
mutationcraft-legacy-neoforge-1.1-1.21.1.jar. Change the file and its required mods may change too.
Install GeckoLib first. We found matching files for this game-version and loader setup.
We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add Mutationcraft without breaking your instance.
Built for mutationcraft-legacy-neoforge-1.1-1.21.1.jar. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use mutationcraft-legacy-neoforge-1.1-1.21.1.jar. It targets 1.21.1 with NeoForge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install GeckoLib first. We found matching files for this game-version and loader setup.
- 03
Put it on the correct side
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside mutationcraft-legacy-neoforge-1.1-1.21.1.jar. It opens that exact file at the source.
About this project
What does Mutationcraft add?

Mutationcraft adds a mutant outbreak to Minecraft.
Hello Mutationcraft lovers! I'm Sxilverr, the new owner of Mutationcraft (the former author is ASEStefan).
I have big plans for this mod, which includes a huge overhaul in the future. Right now, I have released the "Mutationcraft Legacy" which is the fixed version of the classic mod before the overhaul comes, so you can still play and enjoy the original!! :D
Requires: GeckoLib
Outbreak System:
Every world has an outbreak timer that counts up overtime. At first only Miters will roam around. As the timer goes higher, stronger tiers of mutants start spawning:
- Common: Assimilated Villagers, Pillagers, Witches, Wandering Traders, Humans and Roamers, assimilated animals (pigs, cows, sheep, horses, donkeys, wolves, foxes, bears, spiders), Assimilated Jockeys and Rotten Skeletons. Assimilated Piglins spawn in the Nether.
- Parasites: Necroptors and Reductors.
- Advanced: Human Stages 1 to 3, the Assimilated Enderman, the Assimilated Evoker and the Carnivorae.
- Elite: the Assimilated Creeper, the Flayer, the Parasitic Ram and Roller, and Light and Medium Hooks.
- Bosses: the Corrosion Queen, the Human Herder, the Resenter, the Parasitic Shooter and the Heavy Hook.
The stage (0 to 4) sets how early each tier unlocks. You can change it with /mutationcraft stage or the config.
Spreading infection and Evolving:
- Mobs and players killed by mutants are converted into mutants.
- Mutagen Sickness turns mobs into mutants when it runs out or when they are killed.
- Human Stages evolve into the next stage over time.
- Assimilated Humans become Flayers after killing 5 Skeletons, and Necroptors become Reductors after killing 5 Zombies.
- Hooks grow from Light to Medium to Heavy hooks.
- Interacting with a Rotten Skeleton spawns The Intoxicator.
Mutants are hostile to every other creature.
Hazmats:
Hazmat Guards, Leaders, Medics and Flamethrowers patrol the Overworld with Scientists, and Hazmat Helicopters drop in more of them. They hunt mutants, so they can be good allies, or not.
Gear:
- Infected weapons: the Rapier, Battle Axe, Nordic Axe, Pole Axe, Halberd, Cavalry Sword and Flanged Mace.
- Flamethrower: runs on furnace fuel, overheats if you hold the trigger too long, and sets mutants on fire. Burning mutants take double damage.
- Special items: the Fang Staff, Necroptor Bomb, Poisoned Orb, Assimilated Ender Pearl, Mutagen Serum and Totem of Immunity.
- Armor: Metal and Rusted Metal armor.
- Mutation Bane: an enchantment that deals extra damage to mutants.
- Effects: Bleeding, Corrosion, Severen, Rage, Mutagen Sickness, Sign of Fire and Magic Exhaustion.
Config and Commands:
The config file lets you change mob stats, spawns, stages, evolution, items, and more. The /mutationcraft command covers stage, time, pause, resume, reset, infect, cure, count and purge.
Credits:
- Sxilverr (Owner/Author)
- ASEStefan (Former Author)
- songsofsorrow and Jordaan (Legacy artists)
- Nightfox (Legacy models)
- Quicksounds, Freesound, Zapsplat and others were used for sounds.
- The Some Items and Last Days resource packs were used for some assets.
- Scape and Run: Parasites and other parasite mods for inspiration!
Mutationcraft Legacy is MIT licensed.
The Revamp of Mutationcraft will be ARR.
Project description from CurseForge.
Pick your setup
Mutationcraft by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.21.1
1 loader build1.20.1
1 loader build1.19.4
1 loader build1.19.2
1 loader build1.18.2
1 loader buildCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Mutationcraft versions and loaders
mutationcraft-legacy-neoforge-1.1-1.21.1.jar
27 Sept 2026
mutationcraft-legacy-forge-1.1-1.20.1.jar
27 Sept 2026
Mutationcraft_1.19.2_1.0.6
Mutationcraft_1.19.2_1.0.6.jar
12 Dec 2023
Mutationcraft_1.18.2_1.0.6
Mutationcraft_1.18.2_1.0.6.jar
12 Dec 2023
Mutationcraft_1.18.2_1.0.5
Mutationcraft_1.18.2_1.0.5.jar
17 Nov 2023
Mutationcraft_1.19.4_1.0.5
Mutationcraft_1.19.4_1.0.5.jar
16 Nov 2023
Mutationcraft_1.19.2_1.0.5
Mutationcraft_1.19.2_1.0.5.jar
16 Nov 2023
Mutationcraft_1.19.4_1.0.4
Mutationcraft_1.19.4_1.0.4.jar
15 Sept 2023
Mutationcraft_1.19.2_1.0.4
Mutationcraft_1.19.2_1.0.4.jar
15 Sept 2023
Mutationcraft_1.18.2_1.0.4
Mutationcraft_1.18.2_1.0.4.jar
15 Sept 2023
Mutationcraft_1.19.4_1.0.3
Mutationcraft_1.19.4_1.0.3.jar
16 Aug 2023
Mutationcraft_1.19.2_1.0.3
Mutationcraft_1.19.2_1.0.3.jar
16 Aug 2023
Looking for an older file? The official CurseForge project page is in Resources.