How to try itHow to install and play Killcraft (Minecraft inside ULTRAKILL) · about 20 minutes
Killcraft is ULTRACRAFT turned around: instead of V1 in a block world, you’re a Minecraft player in ULTRAKILL’s levels. A real Minecraft runs hidden in the background with SkyCraft’s mod and Killcraft’s own, and ULTRAKILL draws Minecraft’s player, HUD, blocks and items in its world. Swords, crits, bows, tridents and TNT hurt ULTRAKILL’s enemies through the game’s own damage system. Enemy hits come off Minecraft’s health, so armour, golden apples and shields all work. Placed blocks stop enemy shots and light the level.
goonsn posted it in the chasm Discord as “a little buggy for now”, then shipped ten releases between 4 and 6 October 2026, reaching v1.0.1. Its README credits Claude Opus 5.5, and about half of its commits are co-authored by it.
Lineage
Built on: SkyCraft (Minecraft in Skyrim).
See the whole family tree.