Anthropic Cracks Down on Claude Recreating Games: What It Means for Small Studios

TVS News AI, editorially supervised, presents Anthropic Cracks Down on Claude Recreating Games: What It Means for Small Studios.

On October 27, a social media user pointed out a change in Claude Code: The internal instructions used before every conversation were supposed to prevent the model from recreating existing video games. Anthropic confirmed the change. This is relevant to small developers because promoting their ideas and early game versions is precisely what helps them gain traction, while their work is supposed to be protected by AI.

The background: According to Xataka, so much AI-assisted content had already appeared at the latest Steam demo festival that it overshadowed releases created by humans. At the same time, some independent developers fear uploading demos because AI could copy their game before its official release.

Anthropic is addressing this problem by changing the system instructions of Claude Code. How effective this intervention will be in everyday use is nevertheless questionable: The reported rules operate primarily through the prompt, or the instructions used to guide the model.

What exactly did Anthropic change in Claude Code?

The new rule targets specific recreations. Xataka reports, citing The Verge, that Anthropic has updated Claude Code’s internal instructions. According to the report, they are intended to prevent the model from reconstructing an existing video game.

A Twitter user pointed out the change around October 27 and found the new passage in the system prompt under the identifier “tengu_heron_brook”. According to the report, this rule cannot simply be switched off. Anthropic itself confirmed the change.

As a result, Anthropic is not imposing a blanket ban on AI in game development. The line runs between originality and copying: Claude should be able to help develop new games, but not recreate a specific model so closely that it is merely given a different name or presented as something entirely independent.

What can Claude still create?

Original games remain allowed. According to Xataka, the new rules permit the creation of new games, as well as games within a known genre. A game based on the user’s own designs or resources is also not supposed to be excluded in principle.

The key restriction is: A specific third-party game must not be reconstructed — not under a different name or with the appearance of being something completely independent. The legally and practically decisive difference therefore lies not in the use of AI itself, but in the origin and similarity of the ideas, design elements and resources used.

This distinction is particularly relevant to small studios. They can continue using Claude as a tool for prototypes or new concepts, but they must ensure that the result is not merely a recognizable copy of an existing title.

Why is this such a major problem for indie developers?

The Steam demo festival shows two opposing trends. On the one hand, according to Xataka, more AI-assisted content was created there than releases developed by humans. This helps small teams gain attention for upcoming games in the first place. On the other hand, independent developers say they do not want to publish their demos because they are too afraid that someone could use AI to recreate their entire game before its official launch.

Large studios also use AI intensively. Xataka cites Epic Games as an example, writing that the company even “vibecoded” its store interface. The difference for small teams lies above all in the resources available to them: If a lone developer spends years working on a game, releasing a compelling demo can create exactly the moment when an AI-generated copy becomes particularly visible.

Anthropic’s change therefore addresses more than just a technical model problem. It signals to developers that the provider wants to draw the line between creative AI use and impermissible recreation, at least at the level of the model instructions.

Will the new restriction really work?

Xataka remains skeptical here. Addy Osmani, a member of Anthropic’s technical team, explained on Twitter that the company had added two sentences to the prompt for Claude Code, or Opus 5.5. The aim was to prevent the model from recreating another person’s specific game.

Osmani also acknowledges that there may be cases in which the model refuses what is actually an original work. In such cases, he directed people to Anthropic support. The change can therefore prevent not only copies, but may also block legitimate projects.

Xataka identifies another problem, citing PC Gamer: Opus 5.5 is particularly good at reverse-engineering code. It is precisely this ability that makes the model interesting for development, but it also increases the risk that it will reproduce existing technical or design solutions. As long as the protection operates primarily through additional prompt rules, the decisive question therefore remains whether a user can bypass the restriction or coax the model into producing the same content through different wording.

Overall, Xataka concludes that Anthropic is taking a step in the right direction, but it is difficult to see how that step will actually be enough. This assessment is understandable: A clear rule in the model instructions addresses the problem, but it does not guarantee complete control over every attempted copy.

What does the change mean for small studios?

For developers, there is short-term relief, but no definitive security. Anthropic is now more firmly protecting the boundary between new creations and specific copies in the model instructions. This may make more studios willing to showcase demos again or use Claude to develop their own game ideas.

On the other hand, the control remains incomplete. According to Osmani, the restriction can also affect original projects, while the model’s strong reverse-engineering capabilities have not disappeared. Studios therefore should not rely solely on a new prompt rule to protect their intellectual property rights in full.

The sober interim conclusion is therefore: Anthropic is drawing a clearer line between originality and recreation, and small developers gain an additional argument in favor of using AI. Whether this becomes reliable protection in practice depends on how consistently the new rules apply when users take creative detours.

You can find the detailed assessment, with references to The Verge and PC Gamer, in the Xataka report.