GoKawiilDeveloper uses AI agents to reconstruct Modern Warfare 2's source code in C++
Maurice Heumann spent three months and an estimated 600-700 billion AI tokens using Claude and Codex agents to decompile and rebuild the C++ source code of 2009's Call of Duty: Modern Warfare 2. He reports 99% of the game's functions have been recreated, with 83% matching the original code, and says the game is now fully playable. Two earlier blog posts and a video of the project have since been taken down following a copyright report from the rights holder.
GoKawiil's interpretation of the reporting above, not reported fact.
The project suggests AI coding agents can now tackle large-scale reverse-engineering tasks that would once have required extensive manual effort, though Heumann notes verifying the agents' output was harder than generating it. The takedowns also point to unresolved tension between AI-assisted reverse engineering of commercial software and copyright enforcement by publishers like Activision, which has not commented publicly.
- AI agents from Anthropic and OpenAI decompiled and rebuilt 99% of MW2's functions over three months.
- The project cost an estimated €1,200 via subscriptions or up to $250,000 using API tokens.
- Content related to the project has been removed following a copyright report from the game's owner.
Source: tomshardware.com — Shane Downing, 2026-10-12
Published there as: “Dev used AI agents and more than 500 billion tokens to rebuild Call of Duty: Modern Warfare 2's source code”
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