Mutationcraft

Mutationcraft

Adds new terrifying parasite mutant creatures into the game!

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64.9K Downloads
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Screenshots

assimilated witch
Medium Hook
logo
reductor
parasitic ram
flayer

About this Mod

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

Curseforge Page

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.

Available Versions

Mutationcraft Legacy 1.1release
MC 1.21.1neoforge
September 27, 2026
Mutationcraft Legacy 1.1release
MC 1.20.1forge
September 27, 2026
Mutationcraft [REMATCH] 1.0.6release
MC 1.19.2forge
December 12, 2023
Mutationcraft [REMATCH] 1.0.6release
MC 1.18.2forge
December 12, 2023
Mutationcraft [REMATCH] 1.0.5release
MC 1.19.4forge
November 16, 2023

How to Install Mutationcraft on Your Server

1

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

2

Set forge Loader

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

3

Install Mod

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

Compatibility

Mod Loaders

forgeneoforge

Minecraft Versions

1.21.1, 1.20.1, 1.19.4 (+2 more)

Server-side

✓ Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Mutationcraft server crashes on startup – what to do?

Most common cause: wrong forge version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 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 Mutationcraft compatible with forge and neoforge?

Mutationcraft officially supports forge, neoforge for Minecraft 1.21.1, 1.20.1, 1.19.4. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Mutationcraft – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Mutationcraft 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.

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Details

License
LicenseRef-All-Rights-Reserved
Server-side
Required

Supported Versions

1.21.11.20.11.19.41.19.21.18.2