Claude Code just got a new rule, and nobody announced it in a changelog. Anthropic has told the tool not to recreate a specific existing video game when it runs on Opus 5.5. At the same time, developers say some reverse engineering tasks are being refused too.

I'm Nitin, and I coordinate projects at Debugged Pro. Our developers use AI coding assistants every day, so a quiet change like this matters to us. It should matter to you too. Here is what actually changed, what still works, and how agencies and businesses in India and the USA should respond.

Anthropic has added a game clone rule to Claude Code on Opus 5.5. Image: Cath Virginia / The Verge

What Changed in Claude Code on Opus 5.5

The story first surfaced on X. A user named Chasm posted a screenshot that seemed to show two new sentences in the Claude Code system prompt. The first one reads: "Do build original games, games in a genre, and games from the user's own designs and assets." The second tells the model not to build a recreation of a specific existing game, even if the user renames it or calls it original.

Anthropic did not confirm that exact wording. But Addy Osmani, who works at Anthropic, replied on October 30, 2026. Here is what he wrote, as quoted by both The Verge and Tom's Hardware:

"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. Original games, genre games, and games built from your own designs and assets are meant to keep working."

He added that Anthropic will keep adjusting the balance. He also asked people to send him cases where Claude turns down work that is truly theirs.

The verified facts so far

I read The Verge's report on the Claude game clone crackdown and the follow-up from Tom's Hardware. Here is what both sources support:

The scope. The rule covers Claude Code on Opus 5.5, according to Osmani.
The reason. Anthropic says using Claude to infringe IP breaks its usage policy.
What still works. Original games, genre games and games built from your own designs and assets.
What gets blocked. Recreating a specific existing game, even under a new name.
Open questions. The Verge has asked Anthropic whether other Claude system prompts were updated too.

Why Anthropic Is Pushing Back on Game Clones

The timing makes sense. The Verge notes that retro gaming is being flooded with AI-made decompilations, recompilations and ports. AI coding tools have made it cheap to rebuild a known game piece by piece.

Tom's Hardware points to a darker side. Some game developers have been hit by extortion scams. Scammers threatened to clone their game demos into full games before the real versions could launch. That is a real business risk for small studios.

The rule also lines up with policy Anthropic already had. Anthropic's usage policy lists infringing, misappropriating or violating a third party's intellectual property among the things users must not do. The new prompt lines simply make Claude Code act on that rule more directly.

The Reverse Engineering Reports Matter More for Agencies

Game clones are a narrow problem for most agencies. The bigger worry is the second part of the story. Several users say Claude Code is now refusing reverse engineering tasks as well.

According to Tom's Hardware's follow-up on the Claude Code limits, these reports include:

A developer testing his own software. Former Tom's Hardware writer Jarred Walton said his checks worked fine until October 31. Switching to Opus 4.8 let him carry on.
A product activation request. An acquaintance of a staffer asked Opus 5.5 in Claude Code to reverse engineer a product activation. That request triggered safeguards.
GitHub complaints. Users raised issues on the Claude Code GitHub repository about refusals on game work and reverse engineering.
An account scare. A Redditor claims their account was suspended and then reinstated after using Opus 5.5 with a tool called Reverse Engineer Anything.

Anthropic has not confirmed a separate reverse engineering rule. Walton thinks one may exist, given that the refusals all appeared in the same week. Tom's Hardware also notes that Anthropic runs a Cyber Verification Program. Under it, only approved groups get the full set of cybersecurity features in its frontier models.

Claude Code runs on Anthropic's Claude models, including Opus 5.5. Image: Anthropic

How the Claude Code Rule Affects Real Agency Work

Most agency work has nothing to do with copying games. Still, the line between "inspired by" and "copy of" shows up in client briefs all the time. Here is how I see the impact across common project types.

Project type	Likely impact	What to do
Original game or genre game	Should keep working	Describe your own mechanics and assets clearly
Client brief that says "build a clone of X"	Likely refused on Opus 5.5	Rewrite the brief around original features
Legacy app migration	Possible friction if it looks like reverse engineering	State ownership and share the source you hold
Security testing on client systems	Possible refusals	Get written scope and use approved security tooling
Web apps, APIs and dashboards	No reported change	Carry on as usual

The "app like X" brief problem

Many clients in India and the USA open with a reference. "We want something like Candy Crush." Or "make it feel like our competitor's app." That is normal. But if your team pastes that brief straight into Claude Code, the tool may read it as a request to copy.

The fix is better scoping, which you should do anyway. Break the reference into your client's own features, rules, art style and flows. That keeps the work legal and gives Claude Code a clear, original target.

A 6-Step Plan for Agencies Using Claude Code

Here is the plan we are following at Debugged Pro. It is simple, and none of it depends on guessing Anthropic's next move.

Audit your briefs. Search open tickets for words like "clone", "copy" or "same as". Rewrite them as original feature lists.
Prove ownership up front. Keep a short note in each repo that says who owns the code and assets. Mention it when a task touches old binaries or third party files.
Pin and track model versions. Log which model each team uses. If refusals start, you will know whether Opus 5.5 is the cause.
Keep an approved fallback. Plan a second tool or model for deadline-critical work. Make sure your client contract allows it.
Do not try to dodge the rule. Some people suggest running Opus through another harness or a wrapper. If the work infringes someone's IP, a workaround does not make it legal.
Report false refusals. If Claude Code blocks your own work, collect the prompt and context. Osmani has asked for these cases, and clear examples help everyone.

If you need help setting up a cleaner AI coding workflow, our software development consulting team can review your process and tooling.

What This Says About AI Coding Tools in 2026

The biggest lesson here is not about games. It is about how AI coding tools change. A system prompt edit can change what your team is able to ship overnight, with no notice and no line in the release notes.

We saw a similar pattern with pricing and limits. Our recent post on ChatGPT usage limits and the Codex shared pool covered how quickly plan rules can shift. Tool security is another moving part. We also wrote about the fake Claude Code extension supply chain attack that hit Cursor users.

So treat AI assistants like any other vendor. Watch for changes, test before big releases and never let one tool become a single point of failure.

A quick note for businesses hiring agencies

If you are a business owner, ask your agency two questions. Which AI tools do you use on my project? And what happens if one of them stops working? A good partner will have clear answers to both.

Key Takeaways

Claude Code on Opus 5.5 now steers away from recreating specific existing games, even renamed ones.
Original games, genre games and projects built from your own assets are meant to keep working.
Users report reverse engineering refusals too, but Anthropic has not confirmed a separate rule.
Rewrite "clone" briefs into original feature lists and document ownership of code and assets.
Track model versions and keep an approved fallback tool for urgent client work.

Frequently Asked Questions

What did Anthropic change in Claude Code?

Anthropic added two sentences to the Claude Code prompt on Opus 5.5. They steer the tool away from recreating a specific existing game. Anthropic's Addy Osmani said this is because using Claude to infringe IP is against its usage policy.

Can I still build games with Claude Code?

Yes. Osmani said original games, genre games and games built from your own designs and assets are meant to keep working. The rule targets copies of a specific existing title, even when the copy is renamed.

Does the rule affect other Claude models or apps?

Based on current reports, the game blocking seems limited to Claude Code running on Opus 5.5. Tom's Hardware said one developer kept working after switching to Opus 4.8. The Verge has asked Anthropic whether other system prompts changed too.

Is Claude Code also blocking reverse engineering?

Users say yes, though Anthropic has not confirmed a separate rule. Tom's Hardware received direct reports of refused reverse engineering tasks. It also noted that Anthropic runs a Cyber Verification Program for approved security work.

What should an agency do if Claude Code refuses legitimate work?

Document that the code or assets belong to your client, then rephrase the task around that ownership. Osmani invited people to send him cases where Claude turns down their own work. Keep a second approved tool in your plan for deadline-critical tasks.

About the Author

Nitin Kumar is the Lead Project Coordinator at Debugged Pro. He works with development teams and clients across India and the USA to plan, scope and deliver software projects. He writes about practical ways agencies can use AI tools without putting client work at risk.