Build something Playable
Describe a game. Get a real iOS app with RealityKit scenes, generated art, and a live Home Screen widget.
The harness is still in development, so there is no live playground yet. The demos below are recordings from real builds.
One prompt, one build,
one phone.
Every clip below is a screen recording off a device, from a game the harness generated end to end. Pick a prompt.
Meet Playable
Start with an idea
Describe the game in a sentence, or drop in a reference clip. Playable turns it into a game definition: feature flags, a content catalog, and an art brief.
Watch it get built
The harness generates the catalog, renders the sprites, wires the RealityKit scene, and emits a signed app you can install and play on a device.
Play it, then push it
Iterate in plain language. Tuning, economy, and unlocks are data, so a change lands in seconds and the Home Screen widget follows along.
Under the hood
AI Harness for iOS games with RealityKit
You describe a game. The model fills in a world file, the app checks it and fixes what is wrong, and then plays it. Everything the model is allowed to say is already built and tested inside the app.
- Asset and script generation
- One prompt writes the world file and the art briefs together, so the layout, the rules it names, and the pictures that go with them all land in the same pass.
- 3D objects and animation
- Props, characters, and terrain are built from low-poly solids while the game loads. One rig walks, runs, and idles by reading how far it just moved.
- RealityKit compatible
- Every line the model writes maps onto RealityKit Entities, Components, and Systems already compiled into the app, so a generated world loads like a native scene.
- Fun gameplay rules built in
- Casting, chasing, carrying, scoring, and timed rounds ship as tested behaviours. The model picks and tunes them, and feel presets keep the numbers playable.
Discover starters
Genres the harness already knows how to build. Start there, then talk it somewhere else.
AquaCatch
Fishing loop with a live Home Screen tank
Tabletop Defense
Surface-anchored lanes and waves
Pocket Slime
Idle companion with mood decay
Standing Stones
Card battler with stand-up creatures
Rock Skipper
One-thumb physics toy, endless scoring
Terrarium
Grow-and-collect sim, widget-first
Night Market
Stall management with an economy curve
Paper Racer
Folded-paper karts on a real desk
Turn your idea into games.
We're building with a small group of people who want a game on their phone by the end of the afternoon. Tell us what you'd prompt.
Request access