Anthropic reportedly adds rule barring Claude from recreating existing games

X user Chasm spotted an update to Claude's rules pushed around October 27 that permits original games but forbids recreating a specific existing game, even if renamed, with no way to disable it. Digital Sun Games and other studios cancelled public playtests over fears demos could be ingested by AI tools and cloned, and developers have pressed Valve on stopping such clones on Steam. The report notes the rule may only deter low-effort copycats, since users can turn to open-weight models without such limits.