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TRUE, BUTHeadline Over Filing

Anthropic: a game rule, cyber blocks

Anthropic confirms a game rule, and its own 6 October post says its public models block most cyber work.

“Anthropic's Claude AI blocks video game cloning and reverse-engineering, with sweeping new restrictions that also hit legitimate developers and basic troubleshooting tasks.”

Tom's Hardware headline (31 October 2026), on a new Claude Code rule about recreating games

Recorded 1 November 2026. Our ruling means: literally true, materially misleading.

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Receipts pack

The evidence file for this verdict

17 receipts: 5 support the claim, 0 contradict it, 12 add context. 2 figures on the record, 1 traced to a quoted receipt.

The receipts

Each source, the line we quote from it, its date and which way it cuts. Free to read and to cite.

  1. 1Supports the claimtomshardware.com ↗

    According to multiple user claims, Anthropic's Claude Code and/or Opus 5.5 model are blocking attempts at innocuous reverse-engineering

    Look up an archived copy ↗

  2. 2Contexttomshardware.com ↗

    sweeping new restrictions also hit legitimate developers and basic troubleshooting tasks

    Look up an archived copy ↗

  3. 3Contexttomshardware.com ↗

    There is no official or additional confirmation if this is the actual rule text

    Look up an archived copy ↗

  4. 4Contexttomshardware.com ↗

    The simultaneous timing of both game- and cyber-security restrictions may be a coincidence

    Look up an archived copy ↗

  5. 5Contexttomshardware.com ↗

    it's odd to see that 24 days have passed since then

    Look up an archived copy ↗

  6. 6Supports the claimgamedeveloper.com ↗

    We added two sentences to Claude Code's prompt on Opus 5.5 to steer it away from recreating someone else's specific game because using Claude to infringe IP is against our usage policy

    Look up an archived copy ↗

  7. 7Supports the claimgamedeveloper.com ↗

    Do not build a recreation of a specific existing game, even if it is renamed or called original.

    Look up an archived copy ↗

  8. 8Contextgamedeveloper.com ↗

    Chasm reports that there is no way to disable the rule.

    Look up an archived copy ↗

  9. 9Contextpcgamer.com ↗

    In the meantime, if Claude turns down something that's yours, send it my way.

    Look up an archived copy ↗

  10. 10Contexttomshardware.com ↗

    Anthropic's Claude AI blocks video game cloning and reverse-engineering

    Look up an archived copy ↗

  11. 11Supports the claimtomshardware.com ↗

    at least one is a bona fide developer with a real track record

    Look up an archived copy ↗

  12. 12Contexttomshardware.com ↗

    Anthropic introduced its Cyber Verification Program on October 6

    Look up an archived copy ↗

  13. 13Contextgamedeveloper.com ↗

    X (formerly Twitter) user Chasm said that they spotted an update to Claude Code's "rules"

    Look up an archived copy ↗

  14. 14Supports the claimanthropic.com ↗

    have conservative cyber safeguards that block most cyber work. This is intended to limit the harmful activities malicious actors can carry out using our models, while we continue to work to reduce false positives for secure coding.

    Look up an archived copy ↗

  15. 15Contextanthropic.com ↗

    is for defensive work, including security operations center and incident response tasks, reverse-engineering malware, and analyzing and validating vulnerabilities.

    Look up an archived copy ↗

  16. 16Contextanthropic.com ↗

    Our generally available models can continue to be used for tasks such as code review, patching known issues, vulnerability finding in owned source code, and triage of security alerts.

    Look up an archived copy ↗

  17. 17Contexttomshardware.com ↗

    restrictions may be a coincidence, and yet there are complaints from purported game developers saying that Claude blocked their own games' anti-cheat development and security reviews

    Look up an archived copy ↗

Members' extras

What each receipt proves, and what would change our mind.

  • What each receipt above proves, in our words
  • The figures table, each number traced to the receipt that states it
  • The trick behind the claim, explained, with the guide to spotting it
  • What would change our verdict
  • Our call on the record, with its due date

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