Anthropic clamps down on Claude’s AI video game clones
Anthropic clamps down on Claude’s AI video game clones
Anthropic updated Claude Code's system prompts to prevent AI from replicating specific games, but users can still use it to create original games. This move aims to address the current issue of rampant decompilation, reassembly, and porting of AI-generated retro games. Anthropic added relevant instructions in the Opus 5.5 version, emphasizing the creation of original games, specific types of games, or games built based on users' own designs and resources, prohibiting direct copying of existing games.
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Anthropic updated Claude Code's system prompts to prevent AI from replicating specific games
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Anthropic bans game cloning in Claude Code to combat the wave of AI replicas
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Anthropic is steering Claude away from recreating specific titles, but users can still use it to make their own games.
Anthropic is steering Claude away from recreating specific titles, but users can still use it to make their own games.
by Jay Peters
Nov 2, 2026, 6:56 PM UTC
Image: Cath Virginia / The Verge
Jay Peters
is a senior reporter covering technology, gaming, and more. He joined The Verge in 2019 after nearly two years at Techmeme.
Anthropic has updated Claude Code’s system prompt to prevent the AI tool from being used to recreate existing video games, as reported by Tom’s Hardware. Retro gaming is currently being overrun with AI-made decompilations, recompilations, and ports, but while Anthropic will still let people use Claude Code to make games, it doesn’t want people to use it for direct clones.
Last week, a user on X posted a screenshot allegedly showing two new sentences added to Claude Code’s system prompt: “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 named or called original.”
Anthropic’s Addy Osmani, in a reply, didn’t confirm that specific language but did say that the company had updated the prompt in Claude Code on Opus 5.5:
We added two sentences to Claude Code’s prompt on Opus 5.5 to steer it away from recreating someone else’s specific game because using Claude to infringe IP is against our usage policy.
Original games, genre games, and games built from your own designs and assets are meant to keep working.
We’ll continue to iterate to ensure we’re striking the right balance. In the meantime, if Claude turns down something that’s yours, send it my way.
We’ve asked Anthropic if it has or will be updating other Claude system prompts as well.
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- Jay Peters
Source: The Verge · AI · theverge.com