Anthropic Blocks Claude From Recreating Existing Video Games

Anthropic added instructions to Claude Code's system prompt telling it to build original games, games in a genre, and games from the user's own designs, and not to recreate a specific existing game.

Yes, you can use it to build original games, genre-inspired games, or games based on designs and assets you own, but not to clone a specific existing game.

According to the report, AI-assisted decompilations, recompilations, and ports of retro games are spreading, and Anthropic does not want Claude Code used for direct cloning of existing games.

It may affect those using Claude Code to rebuild or clone old games. Developers building original games or modifying games they have rights to will be largely unaffected.