Anthropic Updates Claude to Restrict Game Recreations

Anthropic has updated Claude Code to prevent the AI from recreating specific existing video games. The new rule, identified as “tengu_heron_brook,” instructs the model to build original games or genre-based projects while explicitly prohibiting the replication of existing titles, even if renamed. The update was pushed to users around October 27.

Addy Osmani, a member of Anthropic’s technical staff, confirmed the change is intended to prevent intellectual property infringement. The restriction applies to the Opus 5.5 model.