Unexpectedly, just a few days later, Anthropic decided to relax Claude Code’s game development restrictions. At the end of last month,Anthropic, in order to prevent people from using AI to copy existing gamesA rule was added to the prompts for Claude Code paired with the Opus 5.5 model, but because it was too strict, even normal game development could be blocked. Recently, Anthropic staff member Addy Osmani confirmed on X that the rule has been adjusted in Claude Code version 2.1.317, and developers can now ask Claude to reference the gameplay of existing games to help create original works of the same genre.
Anthropic Relaxes Claude Code Game Restrictions: Mentions of Existing Games and Gameplay Descriptions Are No Longer Rejected; Requests to Copy Must Be Redirected to Original Ideas
According to foreign media Tom’s Hardware According to the report, Anthropic staff member Addy Osmani explained the adjustment on X. He admitted that last week the team added a brief rule to prevent Claude from reproducing specific games, which also caused some developers to encounter Claude Code refusing to work on game projects that it should have been able to complete directly.
An update on building games with Claude Code: Last week some of you ran into Claude Code pushing back on game projects it should have just built. We’d added a short rule to the Opus 5.5 prompt to steer Claude away from recreating specific existing games, but it was also kicking in when you referenced one just to describe the mechanics you wanted. We’ve updated that rule in 2.1.317. You can name a game to describe what you want and Claude should now build an original game in that genre. If you ask for a copy of the original, it’ll offer to build something similar instead. We want Claude to be as helpful as possible when you’re building something original, but also to protect your work if someone else tries to copy it. We’ll keep improving this, so let us know if Claude turns down work that’s yours. Thanks to everyone who shared feedback!
— Addy Osmani (@addyosmani) November 4, 2026
The revised rules have been added to Claude Code 2.1.317. According to Osmani, the new approach is divided into two cases:
- Describe your requirements using a game title: you can simply name a game and explain the gameplay and mechanics you want, and Claude should create an original game in the same genre.
- When asked to directly copy a particular work: Claude no longer refuses outright, but instead offers to make a similar but original work.
For example, before the fix, if you told Claude, “I want to make a game like Tetris, where blocks fall down and you clear a row when it’s full,” the entire task would likely be refused outright. Now Claude should understand that you want a “falling-block clearing” style of gameplay and help you make an original version.
Why does Anthropic restrict AI from copying games? Many people may wonder about this.
In the past, decompiling and remaking a game often required a group of highly skilled volunteers to spend months or even years. With the advent of AI-powered software development, that time has been drastically shortened in an instant. Although the results may not be perfect, at least a replica is no problem.
Mark Brown of Game Maker’s Toolkit mentioned in a video that someone used Claude Code to make a clone of his game Word Play—which took him 7 months to create—in about 12 minutes:
In addition, Tom’s Hardware also mentioned that malicious actors used AI to reverse engineer demos from small independent developers and then threatened to release AI-completed versions in order to demand ransom. According to ETV Bharat To recap, Weasel Pit, the developer of the indie game Iron Pilgrim, was asked at the end of September to pay $200 worth of Steam items within 24 hours (though the authenticity of this case remains disputed).
Korean studio YNOT also took down the demo version of “Spookitchen” on October 20 after receiving a similar letter.
❗️ Indie developers on Steam are being told to pay up, or an AI clone of their unreleased game will come out first. Demands run from hundreds to thousands of dollars, and many have pulled their demos, Risky Bulletin reports. Valve calls it a matter for law enforcement. https://t.co/nWiG5MkFxB
— International Cyber Digest (@IntCyberDigest) November 2, 2026
At this point, Anthropic was caught in the middle: on one hand, it had to address game companies’ and publishers’ concerns about intellectual property, and on the other, it had to let paying users develop their own games normally.
Note that this time it also isn’t a complete removal of the game cloning restrictions; the principle that you can’t reproduce specific existing games still stands. If you want to use Claude Code to make games, remember to check whether you’ve updated to version 2.1.317 or later—the chance of being falsely blocked should be much lower.
Source: KOCPC Chinese