Anthropic introduced Claude Code game restrictions to prevent AI recreation of existing video games, but developers claim the rules also block original projects. The change, discovered through a server configuration called tengu_heron_brook, explicitly prohibits recreating specific games even when renamed or presented as original.
Anthropic's Addy Osmani confirmed the restrictions, stating they aim to prevent intellectual property violations. However, developers reported issues with projects using original code and customer materials, including a GitHub case where Claude refused to assist with board-wargame modules after the restriction update.
The restrictions have raised concerns in the PC modding community, where AI tools are used for reverse engineering and preservation. While Anthropic allows original game development, the new rules have led to unintended consequences, prompting calls for refinement.