How to try itHow to install and play Portalcraft (Minecraft in Portal 2) · about 15 minutes
Portalcraft runs the real Portal 2 and a hidden Minecraft: Java Edition 26.3 side by side. Portal 2 draws everything and runs its own puzzles. Minecraft supplies the player, hand, hotbar, health and blocks. Mining into a chamber wall reveals Minecraft ground behind it, and holding G while Chell fires a portal opens its partner onto a Minecraft landscape generated from your own seed. J switches between the Minecraft player and Chell. Faith plates, light bridges, lasers, turrets and gels still work on the Minecraft player.
The README credits SkyCraft for “the idea, the architecture and large parts of the Fabric mod, including digging”, and SourceAutoRecord for the plugin framework that hooks Portal 2. The repository appeared on 10 October 2026. Version 0.2.0, the first GitHub release (12 October), added Windows to the Linux build. The repository has a single commit, co-authored by Claude Opus 5.5. The author calls it “early, experimental and still quite broken” and asks for help, especially with smearing artifacts in the Minecraft world.
Lineage
Built on: SkyCraft (Minecraft in Skyrim), Fabric.
See the whole family tree.