Anthropic's Claude Refuses Game Cloning and Reverse-Engineering Work

Anthropic's Claude models are now refusing a wide range of software work, from rebuilding an existing game to reading a Windows crash dump, and developers say the refusals began roughly a week ago.

Multiple users report that Claude Code and the Opus 5.5 model block routine reverse-engineering tasks, including work done with the popular Reverse Engineer Anything (REA) tool. The behavior appears to trace back to a text rule now in force, which reportedly instructs the model to avoid recreating a specific existing game.

What does the new rule actually say?

Twitter user Chasm published the alleged wording. The game-related portion reads: "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."

There is no official confirmation that this is the exact rule text. It is plausible enough, given how consistent the refusals have been over the past week. The rule has real teeth, whatever its precise wording.

Who is affected?

Claude Code's GitHub repository shows a wave of issues from users who hit refusals during ordinary development. The blocked tasks include:

• standard game work stopped halfway through a project;
• replicating a game mechanic;
• patching a tabletop-style game.

Some of those reports may come from users with bad intent, but at least one comes from a developer with a genuine public track record. The refusals are not limited to game code.

Reddit and other platforms carry reports of Claude declining to analyze a simple Windows crash dump, to clear junkware from a Samsung TV, or to use REA at all. Purported game developers also say Claude blocked work on their own games' anti-cheat systems and security reviews, citing triggered safeguards.

Is this connected to Anthropic's cyber program?

The timing points to a possible link. On October 6, Anthropic launched its Cyber Verification Program, which limits access to advanced cybersecurity capabilities in its frontier models to entities covered by Project Glasswing, effective immediately.

The same ruleset may be behind the cybersecurity-related refusals. The timing is not clean, though. Twenty-four days passed between the program's launch and the recent wave of complaints, so the connection remains unproven. It may also be pure coincidence that game and security restrictions surfaced together.

Anthropic has issued no official statement on any of this. The company is not alone in tightening the screws: OpenAI recently deactivated the account of a user who tried to clean up their TV's software.

Why would Anthropic do this?

Two motivations stand out. The first is legal self-defense. A recent rash of AI-powered clones of application suites, including Adobe's and Microsoft Office 365, plus countless recomps and decomps of console games, has likely put every major software company in close contact with its lawyers. Blocking game cloning and reverse-engineering preemptively shields Anthropic, and by extension other AI vendors, from lawsuits over tools that recreate proprietary software.

The second motivation is the state of the games market itself. The recent Steam Next Fest was flooded with AI-generated copies of existing titles. That situation has turned ugly: developers report extortion attempts, with threats that their demos will be cloned into finished games before the originals ship. The victims are small studios whose main priority, as one account put it, is "having food," rather than large publishers.

What happens next?

The online reaction has been swift and pointed. Users facing reverse-engineering work say they will simply switch to Chinese, open-weight, or locally run models instead of Claude or GPT. That response highlights the irony many commenters have noted: frontier AI companies trained on the world's information and art now object to copyright infringement.

For Anthropic, the commercial risk is that overly broad refusals push legitimate developers toward competitors, while the legal risk of doing nothing grows with every AI-generated clone that ships on Steam. How the company tunes these rules will determine whether Claude stays useful for the everyday troubleshooting work developers now find blocked.