AI agents used 500 billion tokens to rebuild Modern Warfare 2 source code

By Splitfeed EditorialLast updated Oct 13, 2026, 15:00 UTC

On October 12, 2026, a solo developer published a project reconstructing the source code of Call of Duty: Modern Warfare 2, the 2009 Activision shooter, using AI agents that collectively processed more than 500 billion tokens. The reconstruction achieved an 83% byte-for-byte match across the game's functions, meaning the majority of the original executable's logic was reproduced without access to the underlying proprietary code. The scale of token processing involved dwarfs most AI workloads reported publicly to date, and the fact that a single developer completed the effort underscores how accessible these tools have become.

The significance here extends beyond a technical curiosity about a fifteen-year-old game. Reverse-engineering at this fidelity and speed suggests that AI agents can now systematically reconstruct complex, closed commercial software from compiled binaries alone. That raises immediate questions about intellectual property law, since reproducing a commercial game's functions byte for byte, even without directly copying source code, sits in contested legal territory. Copyright doctrine in software has historically focused on whether functional similarity crosses into unlawful copying, and an 83% match invites exactly that scrutiny. The project also signals a potential shift in preservation and modding communities, where reconstructing legacy code has long been painstaking manual work.

Because no published reactions from the Pro-AI, Anti-AI, or Middle Ground camps have appeared yet, their positions can only be anticipated based on their typical stances. The Pro-AI camp would likely celebrate this as a demonstration of AI's practical utility for preservation, accessibility, and developer productivity, framing the token cost as worthwhile given the result. The Anti-AI camp would be expected to focus on the copyright implications, arguing that AI enabling rapid reproduction of proprietary commercial code at scale poses a serious threat to rights holders and sets a dangerous precedent. The Middle Ground camp would probably acknowledge the technical achievement while calling for clearer legal frameworks before such projects become routine, treating this as a case study in why governance has not kept pace with capability.

The most consequential next development to watch is whether Activision or its parent company Microsoft responds legally or through a takedown, and whether any court or regulator offers guidance on how existing copyright law applies to AI-assisted functional reconstruction of commercial software.