Anthropic has updated Claude Code’s system prompt for Opus 5.5 to stop the coding assistant from recreating existing video games. Employee Addy Osmani confirmed the change on X, saying that using Claude to infringe intellectual property violates the company’s usage policy.
The restriction has been active for several days and applies even if a game clone is given a new name or described as an original project. Users can still create their own games, including titles in established genres, and use custom assets. However, some users have reported encountering issues with original projects as well.
The change follows a wave of AI-assisted projects recreating well-known games. Users have used Opus 5.5 and GPT-6 Astra to produce unofficial browser ports of titles including Halo and GTA Vice City. Reverse Engineer Anything is among the tools cited in these efforts, pairing AI agents with reverse engineering to convert native binaries into readable pseudocode.
Other reported examples include a developer recreating parts of Adobe’s Creative Cloud apps and a surge of PlayStation 5 emulators after a jailbreak. Osmani said Anthropic plans to continue adjusting its rules.
Sources: The Decoder.