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Anthropic Bans Claude Game Cloning

Anthropic pushed a hidden rule on Oct 27 to Claude Code banning recreation of existing games, with no opt-out.

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Key points

  • Claude Code picked up a new rule around Oct 27, sent from Anthropic's servers under a flag called "tengu_heron_brook", with no setting to turn it off.
  • The full rule states: "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 renamed or called original."
  • @kimmonismus said Anthropic no longer allows good benchmarks like Minecraft or GTA 5 recreational games.

Key points and the reaction summary are written by AI from the posts on this page. Check the original post. How we use AI

Original post

chasm @chasmmmmmmmmmmm 8,452 followers

ANTHROPIC IS CRACKING DOWN ON VIDEO GAME REWRITES 🚨 Claude Code picked up a new rule around Oct 27, sent from Anthropic’s servers under a flag called "tengu_heron_brook". There’s no setting to turn it off. The full rule: “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 renamed or called original.” Is this the end of game rewrites, modding and everything in between?
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What others are saying

2 more
  1. Anthropic pushes a rule banning Claude Code from recreating existing games; Steinberger advises using your own harness.

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  2. Chubby♨️ @kimmonismus 680

    Anthropic added a rule barring Claude Code from recreating existing games, seen as IPO-driven copyright caution, prompting a pro-open-source argument.

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Top replies on X

Reaction on X: Most replies are critical of Anthropic, with the top-voted replies joking that open-source abliterated models will take over, mocking the volume of prohibitions, and questioning the copyright rationale since reverse engineering is not illegal in most places. One reply argues Anthropic bears zero responsibility for what users do. The original poster did not respond.

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From @isthatvark, @SanGraphic, @sdmat123 and others. Spam removed, with English and Chinese translations.

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