TL;DR
Play games on Amazon Luna for your next adventure, included with Prime
- A rotating selection of games, no download needed
- Play on TV, laptop or phone
- Fast, free delivery for your gear, too
Anthropic added instructions telling Claude Code not to recreate specific existing games, including under different names. The company says original game development remains allowed, but developers report refusals affecting customer-commissioned projects, raising questions about how the restriction is applied.
Anthropic has added instructions to Claude Code telling the assistant not to recreate specific existing video games, even if a project is renamed or described as original. The change is intended to discourage intellectual-property infringement, but developers say the rule has also blocked work on some projects they describe as original or customer-authorized, leaving questions about how the tool distinguishes game clones from other development.
The instruction appeared in a server-delivered configuration identified as tengu_heron_brook, according to an X post by Chasm, whose discovery was reported by Game Developer. The wording says: “Do not build a recreation of a specific existing game, even if it is renamed or called original.” The reported instruction does not ban AI-assisted game development outright: original games, genre-inspired projects, and work based on a user’s own designs and assets remain permitted.
Anthropic’s Addy Osmani confirmed that two sentences were added to Claude Code’s prompt for Opus 5.5. Osmani said the change was intended to discourage intellectual-property infringement, which already violates the company’s usage policy. He also acknowledged the possibility of unintended effects and said Anthropic would continue refining the restriction. Developers whose own projects are incorrectly rejected were encouraged to report their experiences.
A developer using the name Conflict Simulations LLC reported in a GitHub issue filed October 30 that Claude Code had begun refusing work on personalized digital board-wargame modules commissioned by paying customers. The developer said the modules use original code and customer-supplied materials and are intended for people who own the corresponding physical games. The developer also said the work is not officially licensed by the publishers. According to the report, refusals began after the developer asked Claude to assess whether the new instruction applied to the existing project.
Game Clones Targeted. Legitimate Projects Caught in the Crossfire?
Anthropic says Claude Code can still help build original games. Developers report refusals on commissioned work, raising questions about how the new restriction is applied.
A narrow rule, with a difficult edge
Anthropic added a prompt instruction aimed at preventing recreation of specific existing games. The company says original development remains allowed, while a developer says Claude Code refused customer-commissioned digital board-wargame modules described as using original code and customer-supplied materials.
Discourage direct recreation
The instruction targets reproducing a specific game, including attempts to disguise the project through a new name or an “original” label.
Commissioned modules refused
Conflict Simulations LLC says its modules use original code and customer-provided materials, for people who own the corresponding physical games.
Where does the line fall?
The reported work is not officially licensed by publishers. The available account does not establish what triggered the refusal or how Anthropic assessed it.
What the instruction says—and what remains uncertain
Anthropic describes the change as a safeguard against intellectual-property infringement, not a blanket ban on AI-assisted game development.
Described as permitted
- Original games and new mechanics
- Genre-inspired projects
- Work based on a user’s own designs and assets
Specifically targeted
- Recreating a specific existing game
- Changing the title to disguise a recreation
- Presenting a recreation as original
“Two sentences had been added to Claude Code’s prompt for Opus 5.5 to discourage intellectual property infringement.” Addy Osmani, Anthropic · as reported
From rule change to refusal report
The sequence comes from the developer’s account and reporting about the configuration. It does not independently confirm the cause of the refusal.
Instruction appears
A server-delivered configuration reportedly tells Claude Code not to recreate specific games.
Rule is discussed
The developer asks Claude Code whether the new instruction applies to an existing project.
Work is refused
The developer says assistance stops on paid digital modules tied to physical wargames.
Company invites reports
Anthropic says it will refine the restriction and asks affected developers to share examples.
The limits of the available evidence
The reported board-wargame refusal is the developer’s account; Anthropic’s assessment of that specific case is not included.
It is not clear how the assistant weighs code, assets, intended users, or a project’s connection to an existing title.
Other reported reverse-engineering refusals have not been directly tied to this game-specific instruction.
No overall count of affected developers, revision timetable, or technical details about enforcement have been provided.
A Difficult Line for Game Tools
The restriction addresses a real policy challenge: a coding assistant can help produce a close recreation of a commercial game, and changing a title or calling a project original does not necessarily make it distinct. Anthropic’s instruction is intended to discourage that kind of work while leaving room for original games and genre-based projects.
But the complaints point to the practical cost of a rule that may be applied too broadly. If the assistant cannot reliably distinguish a clone from a user-built module, a mod, or another project using original code and permitted materials, developers may lose access to help on work that does not involve copying a game’s implementation. That matters to creators who use AI coding assistants as part of their workflow, including those developing tools and content for existing games.
The issue is also relevant to modding, optimization, and game preservation, areas where developers may inspect or adapt existing software without setting out to recreate a commercial game. The reported complaints do not establish that these activities are prohibited, but they raise concerns about how consistently Claude Code applies the restriction in ambiguous cases.
Products Worth Considering
Amazon Kindle Scribe Colorsoft 64GB (1st Generation)
Samsung Galaxy Tab S10 FE 128GB Wi-Fi Android Tablet, Blue
Bose QuietComfort True Wireless Earbuds with Active Noise Cancellation, Black
As an affiliate, we earn on qualifying purchases.
What the New Instruction Says
The reported configuration specifically targets recreations of specific existing games, including attempts to disguise them by changing a name or presenting them as original. Anthropic’s explanation, as relayed by Addy Osmani, frames the prompt change as a way to discourage conduct already covered by the company’s usage policy, rather than as a general ban on making games with AI assistance.
That distinction is important for interpreting the developer reports. The board-wargame modules are described by their developer as commissioned work using original code and customer-provided materials, but they are also tied to physical games and are not officially licensed by their publishers. The available account does not establish whether the assistant’s refusal was triggered by the new instruction, other details of the project, or the developer’s request to evaluate the rule.
Tom’s Hardware has also reported complaints involving reverse-engineering workflows, though a direct connection between those cases and the game-specific instruction has not been established. Reports of other refusals should not be treated as proof that the new rule itself blocks reverse engineering.
“Do not build a recreation of a specific existing game, even if it is renamed or called original.”
— Claude Code instruction, as reported by Game Developer
How Claude Code Applies the Rule
It is not clear how Claude Code decides when a request amounts to recreating a specific game, or how the instruction weighs a project’s code, assets, intended users, and relationship to an existing title. The reported board-wargame case is the developer’s account; the available information does not include Anthropic’s assessment of that particular refusal.
It also remains uncertain whether the refusals in reverse-engineering workflows reported by Tom’s Hardware were caused by this game-specific instruction. No broader count of affected developers, examples of false refusals, or technical details about how the configuration is applied have been provided here. The restriction does not explicitly prohibit modding or optimizing existing games, but that does not establish how the assistant will respond to every request in those areas.
Anthropic Plans Further Refinement
Anthropic has said it will continue refining the restriction and has asked developers whose legitimate projects are incorrectly refused to report their experiences. Those reports may help the company identify cases where the rule is being applied too broadly, though no timetable for revisions or specific changes has been announced.
For now, developers should not assume that every modding or game-related request is blocked, nor that describing a project as original will by itself prevent a refusal. The scope of the restriction and its treatment of disputed cases remain under development.
Source: Wccftech
Key Questions
What does the new Claude Code game restriction prohibit?
It instructs Claude Code not to recreate a specific existing game, including when the project is renamed or presented as original. Anthropic says original game development and projects inspired by genres remain allowed.
Did Anthropic confirm the prompt change?
Yes. Anthropic’s Addy Osmani said two sentences were added to Claude Code’s prompt for Opus 5.5 to discourage intellectual-property infringement.
Why are some developers objecting?
A developer reported that Claude Code refused to help with customer-commissioned digital board-wargame modules described as using original code and customer-supplied materials. The work was not officially licensed by the games’ publishers, and Anthropic’s response to that specific case is not included in the report.
Does the rule ban game modding or optimization?
The instruction does not explicitly ban modding or optimizing existing games. However, developers have raised concerns about refusals, and it remains unclear how the assistant handles every request involving an existing game.
What happens next?
Anthropic says it will keep refining the restriction and encourages developers to report cases where their projects are incorrectly rejected. The company has not announced a timetable for changes.
Source: Wccftech
