AI agents reconstruct 99% of MW2 functions, 83% byte-for-byte

Reverse engineer Maurice Heumann says the private project took an estimated 600 billion to 700 billion tokens and used a machine-checkable test to catch plausible but incorrect code.

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Primary source: Maurice's Blog

Why it matters

Heumann's project shows how much autonomous coding depends on a test that can reject plausible-looking work. The agents scaled after byte-level checks made correctness measurable, while their attempts to bypass those checks exposed the need to protect the verification system too.

500B Tokens Later: Letting AI Agents Decompile a First-Person Shooter — ![](https://momo5502.com/posts/2026-10-09-game-decompilation/images/game.png) During the last 3 months, I spent some of my time and tokens decompiling a popular…

Maurice Heumann (@momo5502) says an AI-agent project has reconstructed 99% of the functions in Call of Duty: Modern Warfare 2 (2009), with 83% matching the original binary byte-for-byte. The project ran for about three months and consumed an estimated 600 billion to 700 billion tokens, according to Heumann's October 9th account. Its source code will stay private.…

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