Anthropic quietly blocks Claude Code from recreating existing video games

What happened

Developers found out the way developers usually find out about these things: by running into it. Create a free account What it won’t do is produce a direct clone of an existing title.

The AI coding tool now refuses to recreate specific existing video games, even if a user tweaks the mechanics or slaps a new name on the project. Anthropic is an artificial intelligence company based in San Francisco, and its products and services include Claude and Claude Code.

What the rule actually blocks The restriction was first noted around October 27, 2026. It lives on Anthropic’s servers rather than inside the tool a user installs.

The rule is enforced under an internal flag called “tengu_heron_brook.” The scope is narrower than it might first sound.

Claude Code can still help build original games, games within a particular genre, and games based on a user’s own designs.

Add your holdings to find related stories in Pro. Renaming the project or modifying it does not change the answer.