Anthropic Adds 2 Sentences to Claude Code to Stop AI Video Game Clones

Anthropic has added two sentences to Claude Code that stop its Opus 5.5 model from cloning existing video games. Developers say the filter also blocks crash dump analysis, anti-cheat work, and debugging of their own projects. The guardrail targets a wave of AI-built game clones. It also arrives before Anthropic’s Nasdaq debut. The company already paid $1.5 billion to settle claims over pirated training books. What Exactly Is Claude Now Refusing? X user Chasm spotted the instruction on October 27. Original games, genre titles, and projects from a user’s own assets remain allowed. However, recreating a specific existing game is now off limits, even under a new name. Addy Osmani, a member of Anthropic’s technical staff, confirmed the change on X on October 30.

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