Anthropic tightens Claude’s rules to stop AI game cloning, but developers face new challenges

AI is making video game creation faster and easier, but it’s also raising copyright concerns. While developers welcome the convenience, some fear their games could be copied within days. These gaming trends are pushing tech companies to rethink AI’s role in gaming and entertainment. Now, Anthropic is tightening Claude’s rules, although the changes could also affect legitimate game development.

Claude introduces stricter rules

Anthropic has updated Claude Code to stop users from recreating specific existing video games, even if they change the names or disguise copied projects as original creations. Confirmed on October 30, the update adds two instructions to Claude Code for Opus 5.5. According to Anthropic engineer Addy Osmani, using Claude to infringe someone else’s intellectual property violates the company’s policies.

That doesn’t mean AI-assisted game development is off the table. You’re still free to create original games using your own designs and assets or explore familiar genres without directly copying existing titles. Put simply, Anthropic wants Claude to help people create the next big hit, not reproduce one that’s already on the market.

Famous games face cloning

It’s easy to see why Anthropic is concerned. Recent gaming industry innovations have made recreating existing titles much easier, with AI-assisted projects reportedly producing playable browser versions of Halo: Combat Evolved, Call of Duty: Modern Warfare 2, and Grand Theft Auto V.

Something that once demanded extensive programming knowledge and months of work can now be completed considerably faster with AI coding assistants. However, that convenience raises uncomfortable questions about copyright and ownership.

Unfortunately, some Claude users report that even legitimate reverse-engineering requests are being rejected. Such restrictions could unintentionally affect modding, compatibility research and game preservation projects that don’t necessarily violate copyright laws.

Indie developers take precautions

Smaller studios have good reason to be nervous. During October’s Steam Next Fest, Alliance Arts and Who You withdrew their Drunken Goddess Reflux demo despite attracting approximately 25,000 Steam wishlists.

Digital Sun took similar precautions, canceling public testing for ReVamp in favor of a controlled Discord playtest. Both studios feared that releasing early versions could give AI users enough material to recreate their games before launch.

Meanwhile, itch.io reportedly saw newly created game pages double within two months, reflecting the growing popularity of AI-assisted gaming content.

Concerns extend beyond commercial entertainment, too. Decomp.dev, a community dedicated to reverse-engineering games, shut down in October after increasingly automated projects undermined the collaborative work that once brought its members together.

Restrictions may not work

Here’s where things get complicated. Despite Anthropic’s efforts, these safeguards won’t necessarily stop determined users from copying games. They could simply switch to competing AI assistants or open-weight models with fewer restrictions.

Besides, where exactly should developers draw the line between inspiration and imitation? Would combining characters from different franchises violate copyright, or could those projects qualify as transformative creations?

Valve has already resisted policing developers’ choice of AI tools, while Xbox has reportedly experimented with the technology internally.

Protecting intellectual property without discouraging creativity is easier said than done. Claude’s update might slow down some copying, but whether it can make a meaningful difference to gaming and entertainment remains to be seen.