Raccoon Heist
Sneak a raccoon past the guards — a 3D browser game generated from one prompt.
Official site simonw.github.io, verified Nov 3, 2026. Linked from the developer's own write-up on simonwillison.net.
Where to play
Every platform this game is on. Links are checked against official sources; we never host or mirror games.
- Play free — official siteBrowserReleasedFree
Runs in a desktop browser. No download.
Browser (no download) · Official link verified Nov 3, 2026.
About Raccoon Heist
A small 3D stealth game in the browser: guide a raccoon past guards to steal loot and bank it before dawn, with a scent-tracking guard dog arriving from night 3. Simon Willison generated it from a single prompt using Claude Fable 5 in Claude Code for web, as an experiment in what one prompt can produce. Two days later he gave the same prompt to OpenAI's Codex; that version is listed separately as Moonlight & Mayhem.
How it was built
VerifiedGenerated from a single prompt with Claude Fable 5 running in Claude Code for web.
A single prompt written on a phone, telling the agent to work independently and make every technology choice; no follow-up prompts are reported.
- Engine / framework
- Not disclosed (browser 3D)
- Languages
- Not disclosed
- Team size
- 1 (solo)Developer Reportedsimonwillison.net
- Initial build time
- Generated from a single promptDeveloper Reportedsimonwillison.net
- Development time
- Not disclosed
- Development cost
- Not disclosed
- AI-written code
- Not disclosed
Verification notes: Tool, model and play link checked in the developer's own write-up.
Game performance
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Browser (official site)
No public metrics recorded for this listing.
Not publicly available: Concurrent players (site), Monthly revenue, Gross revenue.
Sales & revenue (all platforms)
Browser game — there are no downloads to count.
Reviews & rankings
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Not currently ranked.
No player reviews yet.
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Sources
| Source | Type | Published | Accessed |
|---|---|---|---|
| Raccoon Heist simonwillison.net | Devlog | Aug 5, 2026 | Nov 3, 2026 |
| Official game page (language check) Simon Willison | Official site | Not confirmed | Nov 3, 2026 |
