---
title: "Dev rebuilds Modern Warfare 2 source code using Claude and Codex agents"
url: https://www.parallelquant.com/posts/dev-rebuilds-modern-warfare-2-source-code-using-claude-and-codex-agents-b9cd62
source_name: "Tom's Hardware"
source_url: https://www.tomshardware.com/tech-industry/artificial-intelligence/dev-used-ai-agents-and-more-than-500-billion-tokens-to-rebuild-call-of-duty-modern-warfare-2s-source-code-83-percent-of-the-2009-shooters-functions-now-match-the-original-byte-for-byte
published: 2026-10-12T11:00:00.000Z
topics: ["products", "llms"]
publisher: "Parallel Quant"
---

# Dev rebuilds Modern Warfare 2 source code using Claude and Codex agents

*2026-10-12 · Source: [Tom's Hardware](https://www.tomshardware.com/tech-industry/artificial-intelligence/dev-used-ai-agents-and-more-than-500-billion-tokens-to-rebuild-call-of-duty-modern-warfare-2s-source-code-83-percent-of-the-2009-shooters-functions-now-match-the-original-byte-for-byte)*

Developer Maurice Heumann used Claude and Codex agents and more than 500 billion tokens to reconstruct Call of Duty: Modern Warfare 2's source code. About 83% of functions match the original byte for byte.

**Why it matters:** It is a concrete, large-scale example of agents doing decompilation and reverse engineering, a task with a verifiable success metric. It shows both the capability and the token cost of long-horizon agentic work, and raises IP questions for legacy software.

**Topics:** products, llms

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Read the original: https://www.tomshardware.com/tech-industry/artificial-intelligence/dev-used-ai-agents-and-more-than-500-billion-tokens-to-rebuild-call-of-duty-modern-warfare-2s-source-code-83-percent-of-the-2009-shooters-functions-now-match-the-original-byte-for-byte
Canonical: https://www.parallelquant.com/posts/dev-rebuilds-modern-warfare-2-source-code-using-claude-and-codex-agents-b9cd62
Published by Parallel Quant — https://www.parallelquant.com