Image: u/RichyShreddar on Reddit · Four patched stages from the modded Battletoads game
Battletoads & Double Dragon for the Sega reverse engineered and modded
A fan gave Claude Code the 1993 Sega game to reverse engineer with the REA tool, then had it change the game without writing the assembly by hand.
Credits
- Reddit poster RichyShreddar Source ↗
- Repository account morluto Source ↗
Earliest dated source:
The full story
Battletoads & Double Dragon, a 1993 Sega game, reverse engineered and rewritten by Claude Code without its owner writing any assembly. Claude read the ROM through REA, an MCP server for reverse engineering, with the emulator running in a Docker container.
The working pattern was to have Claude study how one thing works first, such as how boss health is set or where the level order lives, then write a patch and a config file that the patch reads, so every change ends up in plain settings.
Claude removed half the enemies, simplified the levels, changed the dialogue and sound effects and replaced the bosses. The result is a free, open-source political parody in which the heroes fight through caricatured guards to kick Elon Musk to Mars.
How it was done
Tools
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Sources
From a short post by the maker, so the details are as they tell them.
- Reddit: I gave Claude Code a 1993 Sega game to reverse-engineerReddit poster: RichyShreddarPosted
The maker's post in r/ClaudeAI explaining how the game was changed.
- The code: github.comRepository account: morlutoRepository created
REA, the reverse-engineering MCP server Claude used to read the ROM.