Anthropic has modified Claude Code’s system prompt to restrict the AI tool from being used to create direct clones of existing video games. The company cited intellectual property concerns as the reason for the policy shift.
According to reports, a user on social media shared a screenshot showing two new sentences added to the system prompt: “Do build original games, games in a genre, and games from the user’s own designs and assets. Don’t build a recreation of a specific existing game, even if it is named or called original.” Anthropic’s Addy Osmani subsequently confirmed that the company had updated the prompt in Claude Code on Opus 5.5, stating that the addition was intended to steer the tool away from recreating another person’s specific game.
Osmani noted that using Claude to infringe on intellectual property violates the company’s usage policy. The update is designed to allow continued development of original games, games within specific genres, and games built from users’ own designs and assets, while preventing the recreation of existing titles.
The move comes amid growing concerns about artificial intelligence-generated content flooding the retro gaming space, with numerous decompilations, recompilations, and ports being created through AI tools. Osmani indicated that Anthropic would continue refining the approach to maintain what it considers the appropriate balance between creative freedom and intellectual property protection. The company has invited users whose requests are rejected by Claude to provide feedback on whether the restrictions are being applied appropriately.
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