Anthropic adds rule stopping Claude from recreating specific existing video games
Original games and genre games remain allowed, but the limit may only deter low-effort copycats, since users can turn to open-weight models without such rules.
Anthropic has added a rule to its Claude Opus 5.5 coding assistant that steers it away from building recreations of specific existing games, while still permitting original games, games within a genre, and games built from a user's own designs and assets. The rule, flagged under the internal label tengu_heron_brook, was first noticed by a user on X and reportedly appeared in the tool's changelog on October 27, with no user-facing setting to disable it. Anthropic technical staff member Addy Osmani confirmed the change and said it was made because using Claude to infringe IP violates the company's usage policy. The move follows weeks of complaints from developers about AI-cloned games flooding Steam and about demos being reverse engineered, and Osmani said Anthropic would keep refining the balance and asked users to report legitimate requests that get refused. Critics note the rule may only stop low-effort copycats, since users could switch to open-weight models without such restrictions.
Why it matters
The change puts a line between copying a specific game and making something new, and it arrives as developers say AI-cloned games are crowding storefronts and that playable demos can be reverse engineered. Digital Sun Games cancelled a public playtest for ReVamp over fear its demo could be used to build an AI clone, and Valve said it does not want to act as a gatekeeper over which tools developers use. For readers, the episode shows how the game industry is trying to protect its work from AI copying while the tools themselves remain widely available.
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