Anthropic restricts Claude from recreating existing video games

Anthropic has changed the instructions that govern its Claude Code tool so that it will not help build copies of specific existing video games. The change was first noticed by a user on X, known as "chasm", around 27 October. Tom's Hardware reported the update.

The new instruction tells Claude to build original games, games within a genre, and games made from a user's own designs and assets. It tells Claude not to recreate a specific existing game, even if the copy is renamed or presented as original. XDA said it independently confirmed the wording in version 2.1.314 of the Claude Code software, released on 30 October.

Growing wave of game copies

Retro gaming communities have seen a rise in AI-made decompilations, recompilations and ports of older games. Tom's Hardware described the trend as the retro scene being overrun with such work. Anthropic has not withdrawn Claude Code's ability to make games. Users can still use the tool to build new games, the company's rule makes clear.

XDA also reported that a similar instruction had appeared in earlier versions of the software for other purposes. It said the Claude Opus 5.5 model appeared to carry its own separate rules restricting game recreations within its system prompt. XDA's findings were based on its review of the software, and the company has not publicly explained the change.

What it means

The rule may give Anthropic some protection against legal claims over copied games, commentators have suggested. Analysts have also said it is unlikely to stop the broader wave of AI-assisted porting and copying, since many such projects can be made with other tools or by people working alone. Anthropic has not said how it will enforce the rule or how it will treat borderline cases. It is also not clear how the instruction will work in practice for games that are only partly similar to an existing title.