A game editor your AI can drive.
Design 2D worlds by hand with real control, then bring them to life with AI-authored stories, scenes, and puzzles — right in your browser. Every edit is checked against the whole game graph, like a compiler for your world.
Runs in the browser and on desktop · one Heimech sign-in.
Concept artWhat it does
Everything you need to author a world.
Author by conversation
Atreus speaks MCP. Point ChatGPT, Claude, or your own agents at it and they create and patch real content through schema-checked tools — with you in the loop.
AI art pipeline
Generate character sprites, animations, and Wang-tileset terrain with PixelLab — queued and streamed into the editor live as they render.
Integrity, enforced
A foreign-key reference graph rejects dangling links on every write. Your world can't silently break, and saves never corrupt.
Maps, built or grown
Author zones by hand or generate terrain and tilesets, with instant textured previews on the canvas — as detailed as you like, no rigid grid.
Playtest in-engine
Auto-play a chapter's canonical path — dialogue, choices, simulated battles — and review the full trace before you ship.
Build & ship
Compile your project to a signed content.pak and publish — the same package the game loads at runtime.
you › add a tense reunion on the harbor map — 3 beats, a locked-door puzzle atreus › drafting scene · linking actors lyra + kael · placing puzzle… ✓ scene "harbor-reunion" added — 3 beats, 1 puzzle, refs validated you › generate a sprite sheet for the harbor sentinel atreus › queued PixelLab job · streaming frames… ✓ 8-frame idle animation attached
In the loop
Direct the scene. Atreus builds it.
Describe a beat and Atreus drafts it — linking actors, placing puzzles, validating every reference — while you stay in control of the world.
Open the editor and build a world.
No install. Sign in with Heimech, create a project, and start authoring — by hand and with AI.