Available to play
Ultracraft
Plays the real ULTRAKILL inside real Minecraft: Java Edition, drawing it into Minecraft's window.
What it does
A Fabric mod plus a BepInEx plugin (UltraBridge) that runs ULTRAKILL alongside Minecraft 1.21.11 and draws it into Minecraft's window. Minecraft's blocks and mobs become ULTRAKILL's world and enemies; the README documents bosses, layer-themed arenas, the shop and upgrades, Cyber Grind, fight music, cheats and LAN co-op.
How it works
Fabric mod in Minecraft + BepInEx 5 plugin (UltraBridge) in ULTRAKILL; the ULTRAKILL render is shown in Minecraft's window while Minecraft supplies the world
Requirements & limitations
Windows; owned copies of ULTRAKILL (Steam, running) and Minecraft: Java Edition 1.21.11 with Fabric Loader 0.19+ and Fabric API. Ultracraft sets up BepInEx 5 and the UltraBridge plugin in ULTRAKILL automatically; Modrinth (.mrpack) and CurseForge modpacks are provided in the releases.
Original sources
Evidence limits
On 2026-10-09 I read the GitHub README, MIT LICENSE, tags (v1.0.2-v1.0.4, all 2026-10-06) and commit history (first commit 2026-10-04); no play-test or binary review was performed.
Code and releases are linked, not hosted here. Game files and footage retain their owners’ rights.