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Luu, T.J.

One-shotting a Raccoon Heist game using Claude Fable 5

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Source: Simon Willison's WeblogAugust 5, 2026

Summary

A developer used Claude Fable 5 (an AI model that can write code) to build a complete 3D browser game called 'Raccoon Heist' based only on old screenshots and a game description from 2024. The AI successfully created a playable game with mobile support by being given clear instructions and access to an OpenAI API key for generating textures, demonstrating that modern LLMs can handle complex, multi-step creative coding tasks with minimal human guidance.

Classification

Attack SophisticationTrivial

Affected Vendors

AnthropicOpenAI

Related Issues

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Original source: https://simonwillison.net/2026/Aug/5/raccoon-heist/#atom-everything

First tracked: August 5, 2026 at 08:01 PM

Classified by LLM (prompt v3) · confidence: 92%