Anthropic Bans Claude from Recreating Existing Games in Opus 5.5 System Prompt
Anthropic confirmed that it added two sentences to the Opus 5.5 system prompt instructing Claude not to recreate specific games belonging to others. This came after blogger chasm discovered that Claude Code was blocking game clones. The rule only constrains Claude itself; users can switch to other models or break tasks down into specific technical tasks whose context does not reveal the overall goal to bypass it. After the ban was announced, a large number of original developers complained on the Claude Code GitHub issue page, saying they were refused when developing original games on the grounds that they were suspected of cloning existing games.
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