AI · GAMES · CREATOR RIGHTS

Can AI Clone a Game? Claude Code, Steam and Developers’ Rights

A fragment attributed to Claude Code says that building a game in a genre is fine, but recreating one specific existing game under a new name is not. Did Anthropic actually introduce that rule, would Steam accept such a game, and how can you make your own without copying? Here is the evidence and practical answer.

Vibe Coding editorial team · October 30, 2026 · We will update this if an official statement appears

Mia draws an original fantasy game world on a large screen — Editorial illustration. The circulating claim is explained in the article below.

What is this story about?

Claude Code is Anthropic’s coding tool. You can ask it to build a game prototype. The discussion began with a circulating text fragment attributed to an internal instruction. In plain language, it says that making an original game or one in a genre is acceptable, but recreating a particular existing game under a new name is not. The fragment also shows the technical name tengu_heron_brook.

This is not an official Anthropic announcement. We could not independently establish the fragment’s provenance or scope: whether every user sees it, whether it is an experiment, or whether it applies to other Claude products. It does not establish a ban on all games resembling others. We therefore separate a report about one tool’s possible behavior, platform rules and the law.

Genre, inspiration and copying are different

Suppose you want to make a platformer. “Make a game where a hero jumps between platforms, collects items and avoids enemies” describes a genre mechanic. “Recreate this specific game with the same levels, characters and music, then rename it” asks for a copy. Between those lies a gray area: different code and names but nearly identical visuals, map, pacing and recognizable details.

The idea of jumping, the survival genre or resource gathering cannot automatically belong to one studio. But particular artwork, characters, writing, music, code and level designs may be protected by copyright; names and logos can also involve trademarks. The precise boundary depends on the work and jurisdiction. Freshly generated code does not give you rights to someone else’s characters.

What about other AI tools?

We did not run identical prompts across all versions of Claude, ChatGPT, Gemini and local models. It would be inaccurate to claim that one service always makes a clone while another always refuses. Behavior depends on the prompt, product, version and settings.

OpenAI’s public policy prohibits using its services in attempts to infringe others’ intellectual property rights. Google’s generative AI policy also forbids creating or distributing material that infringes others’ rights. These are general usage policies, not a list of every permitted game mechanic. Whether a chatbot refuses a request does not decide whether you may sell the result.

Will Steam accept an AI-assisted game?

Yes. AI use alone is not grounds for an automatic rejection. In Steamworks, developers complete a content survey. They disclose AI-generated content included in the shipped game and describe safeguards for live generation during play. Valve reviews games under its platform rules. That process does not license another company’s characters or music.

For example, if AI helped write menu logic while the team created its own world and art, the key question is not “how many lines did AI write?” What matters is the shipped content, the team’s rights to it and an accurate Steam disclosure. The AI information shown on a store page is not a Valve guarantee that the game is original.

What do major game companies say?

In investor Q&A, Nintendo spoke about both the creative possibilities of generative AI and intellectual-property risks. It protects its work without declaring every AI-assisted game unlawful. Ubisoft publicly demonstrated Teammates, an experiment with AI characters and voice interaction. It says human creators define the characters and the limits of their behavior. Both cases show that using AI and copying another game are distinct questions.

How to make your own game instead of a renamed clone

Start with what you like about a genre: short sessions, base building or physics puzzles. Then define your own rule that changes the player experience. For example: “Make a cooperative game about repairing a flying city, where players control the wind together and change the route of buildings.” This gives AI a concrete task without asking it to copy another game’s map or heroes.

When reviewing a prototype, ask whether players would recognize a specific other game from its heroes, levels, icons, music or interface. If so, revise those parts before publishing. Check third-party asset licenses, keep provenance and usage terms, test the build and complete the platform’s disclosures. Changing only the name, colors and a few sprites does not make a copy original.

What happens next?

Our forecast is that tools will increasingly resist direct requests to recreate recognizable games, while platforms will ask more about content provenance. This is a forecast, not an announced Anthropic or Valve plan. Models can make mistakes and change behavior; the developer remains responsible for the game they publish.

This is not a ban on creative game development. AI can speed up prototypes and help with code and testing. The idea, mechanics, original world and rights checks still need a person. That is what separates a memorable game from a quick imitation.

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