Anthropic's New Claude Code Rule Blocks Some Game Projects, and Users Can Work Around It

Anthropic added two sentences to Claude Code's system prompt on Opus 5.5, rolled out around October 27, 2026, and confirmed by engineer Addy Osmani on October 30. The rule tells Claude to refuse building recreations of specific existing games, even renamed ones, while still supporting original games, genre games, and projects based on the user's own designs and assets. The company cites copyright and its usage policy as the reason, following its $1.5 billion authors' copyright settlement in September 2025. The change is a prompt-level instruction rather than a hard filter, so refusals can be inconsistent and some users report legitimate work being blocked. Users are advised to identify which refusal they received, reframe requests around original mechanics, start fresh sessions, and report false positives.
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