ULTRAKILL combat inside Minecraft worlds
Ultracraft runs both games and displays ULTRAKILL combat inside Minecraft’s window. Minecraft provides terrain, creatures and building. The author’s v1.0.4 release, published October 7, 2026 in China, adds teammate markers, revives and cooperative Cyber Grind runs. This is alfr0762’s bridge project, separate from absolutelyaya’s ULTRACRAFT tribute mod.
What you need
Windows, your own installed Steam ULTRAKILL and Minecraft Java Edition 1.21.11. Keep Steam running. Use Fabric Loader 0.19 or later and matching Fabric API. The release sets up BepInEx 5 and UltraBridge in ULTRAKILL automatically. BepInEx 6 is not the documented configuration.
How to get started
- Read the v1.0.4 release and back up your existing mod setup and worlds.
- Import Ultracraft.mrpack into the Modrinth App, or Ultracraft-CurseForge.zip into the CurseForge App.
- Keep Steam running and start the imported Minecraft instance. The mod automatically adds BepInEx 5 and UltraBridge to ULTRAKILL’s folder.
- Open a world. F8 switches between V1 and Steve; /uc help lists commands. Multiplayer participants need the same mod version.
Was this made with AI?
The author explicitly credits Claude through Claude Code for the mod, bridge, tests and guide, under human direction.
Original sources
We checked these pages on . This is a source-review date, not a claim that the game was updated or tested that day.
