Dev rebuilt Call of Duty: MW2 source code using AI agents and 500B tokens

Developer Maurice Heumann spent three months rebuilding the source code of Call of Duty: Modern Warfare 2 (2009) in C++ using AI agents on Claude and Codex, consuming 500–700 billion tokens. 99% of functions are present and 83% match the original byte-for-byte, with the game fully playable.

• Project took three months and 500–700 billion tokens
• 99% of functions recreated, 83% byte-exact matches
• Cost: ~€1,200 via subscriptions or $200,000–250,000 via API
• Agent fleet grew from 4 to 17 working in parallel