A fully playable 3D game level. Built in just 48 hours. No 3D artist. No animator. Just AI.

The result? A giant kitchen where the countertop towers 36 meters above the player.

Here's what went into it:
16 3D models: $8.20 total
31 Claude Code sessions: ~$88 in API costs
Rigging, animations, and Unity scenes: All generated by Claude
But the most interesting part isn't the gameplay.
Most AI game demos show you 20 seconds of impressive footage and skip everything that happened behind the scenes.
This project reveals the entire process: the actual prompts, API configurations, commands, cost breakdowns, failed attempts, and fixes.
Two days. Roughly $96. A playable 3D world.
Opus 5.5 is pushing the boundaries of what's possible with AI-powered game development.

And we're only getting started.