AI model Claude Opus 5.5 fuels wave of browser ports of Halo, GTA, Simpsons
Vibe-coded, AI-decompiled web browser versions of PS2/PS3-era games are reportedly running near-flawlessly, raising new IP enforcement problems for publishers.
What to know
- Claude Opus 5.5's decompiling ability has cut what used to take coders months into an overnight process, fueling a surge of fan-made ports.
- Browser versions of Halo: CE, GTA: Vice City, The Simpsons: Hit and Run, Call of Duty: Black Ops and Skate 3 reportedly run smoothly, with one Halo: CE port offering working low-latency online multiplayer.
- Because the ports are fast and easy to recreate, publisher cease-and-desist letters may not stop new versions from reappearing quickly.
- Take-Two, Microsoft and other rights holders have not been reported taking legal action yet, but are expected to face an enforcement challenge.
“It’s also extremely worrying that one of the four different web browser ports of Halo: CE I played had working online servers…and my ping was low.”
Lewis Parker, Kotaku writer · Kotaku ↗ · Oct 7
Lewis Parker Kotaku writerAnthropic Maker of Claude Opus 5.5Take-Two Interactive Publisher of Grand Theft AutoMicrosoft Publisher of Halo
How it unfolded 2 developments, newest first · click a bar or a number to jump articlesposts
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Story spreads to Hacker News and social platforms
The report circulated further on Hacker News and Mastodon, with readers noting a full list of playable browser ports including MW2 and Black Ops zombies mode.
“you can play Black Ops zombies, Skate 3, Halo and MW2 and more GAMES all run in a browser tab now. full list in the comments.”
— astlouis44 -
> I don't really understand the IP protection angle here [...] What's more interesting is the new ability to easily create ports of old games that let you play old games legally: Bringing your copy of the original's data files and playing on a modernised engine with high-resolution, unlocked FPS, bugfixes, etc. In the past couple of months, I've…
2 more of the top 3 · 24 posts in this stretch
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Decompilation already has precedence to being kosher, so long as the end user supplies his or her own copy of the software (for example OpenGOAL, which natively allows the Jak and Daxter trilogy to run on computers). The tooling today has made it go from a multi year, multi person endeavour to being quite very quick. And with a close approximation…
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Irgendwie ist das Kernproblem, dass das überhaupt im Browser geht. Das bedeutet nämlich im Endeffekt, dass Browser mittlerweile komplette Betriebssysteme sind, in denen wie damals unter Windows 98 Fremdcode mit viel zu vielen Berechtigungen läuft mit den entsprechenden Problemen. Eigentlich müssten Browser viel, viel weniger umfangreich sein…
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- 2 days quiet
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Kotaku finds browser ports of Halo, GTA and Simpsons 'run perfectly'
A Kotaku report documents AI-decompiled browser ports of Call of Duty: Black Ops, Halo: CE, GTA: Vice City, Skate 3 and The Simpsons: Hit and Run, noting several run at high framerate and one Halo: CE port even has working low-ping online servers.
“I’m forced to admit that these AI-decompiled web browser ports... actually seem to run very well.”
— Lewis Parker -
first by Mastodon, 4d ago · also Kotaku, HN Frontpage
3 more headlines
- We Might Be Cooked, As These Vibe-Coded Web Browser Ports Of Halo, The Simpsons: Hit And Run, And GTA: Vice City Seem To Work Perfectly Kotaku · 4d ago
- Vibe coded browser ports of Halo, The Simpsons: Hit And Run, GTA work well HN Frontpage · 3d ago
- Hundreds of AI-decompiled or vibe-coded clones of games appeared in recent weeks, ported to run in browsers; some big titles like GTA: Vice City, Halo play well Kotaku · 3d ago
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background
Claude Opus 5.5 drives a wave of AI-decompiled game ports — Over the preceding couple of weeks, hundreds of vibe-coded, AI-decompiled emulators and game ports appeared online, attributed to Claude's latest Opus 5.5 update being unusually capable at decompiling old game source code.
What people are saying 20 voices from 4 sites · best of 24 · verbatim
- Yesterday
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Yes owning computing power will be too difficult for the average user. Your device will just be a portal to the data center that does all the real computing for you. You will own nothing
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Much of the software economy relies on huge enterprise licenses and support. LibreOffice and GIMP (among others) have been around for ages, but MS Office and Photoshop still pull in the big bucks.
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Yessir, yessir. We had a trial run before. Incentives weren’t there. They are now.
- Oct 11
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I’m not at all up to to date but how does it fare against denovo? Or the kernel based anti cheat engines?
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I’ve used the phrase “execution is essentially free” to describe the rise of AI coding, but after thinking about it, I think a better phrase is “effort is no longer a moat.” It’s now straightforward to copy an app’s functionality or port it simply by pointing Claude at its binary or UI. https:// kotaku.com/we-might-be-cooked-…
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I'd really like to know what the workflow for this is. In terms of the prompt, but also specifically in terms of which part of the decompilation process the model is using- I assume a standard decompiler is used, then what happens? How is the code rebuilt, what are the possible mistakes the AI can make, and what does the result actually look like?
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For any business management systems, it just seems like computer use will be able to go through the entire program systematically and build. Games are one thing, but huge amounts of B2B software is going to get expunged.
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conspiracy hat time! this is a psy-op or some such run by the big ai crops themselves to highlight "ai danger! - in hands of peons it steals everything!" so they build support for regulation on the public so they can maintain their moat that and the you-shall-own-nothing speedrun towards streaming only too.
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Most popular repository of today in github is this ai reverse-engineering repo. Corporations are knee deep in shit unless they start to respect the consumers again.
- Oct 10
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How does it decompile this in this way? you just upload the game's iso and tell it to decompile and then...bam it spits it out?
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In the future, there will be an AI fork of a game that becomes more popular than the original.
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indie games are already getting ripped off en-masse and they have even less security and support to combat something like this. they'll be hit even harder
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I wonder if Rockstar will release GTA VI on PC a year after the console again.If they wait too long, perhaps the community will produce a better port before them.
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Honest question: Anybody has more details how to do this? I.e. I have my favorite game from the DOS/Win95 era I want to port plus a dev background - how to get started with AI reverse engineering?
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What I'm interested in is their performance, since I would assume that they are running in WebAssembly from reconstructed C/C++ code decompiled from binary, what would be the overhead on that compared to running on native? And how does running on WebGPU compared to running with native through DirectX/OpenGL?
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The internet is getting flooded with vibe coded ports of Halo, Simpsons: Hit and Run, GTA: Vice City and more games that you can play in your browser and they all work shockingly well
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My heads exploding. I expected to try Quake and just run through the first level and maybe stop. Being dropped into a multiplayer game and it feeling as good as it did was a jaw dropping moment for me. Quake 3, same experience... my ping wasn't great.I don't know where my quake cds are. Even if I found them I'd have to figure out what mods to run…
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I don't really understand the IP protection angle here: These browser ports are no more or less illegal that hosting a RAM file for use on an emulator, or pirated software in general. And sites hosting them are no harder or easier to shut down than existing piracy sites.What's more interesting is the new ability to easily create ports of old games…
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Opus doesn't push back against this kind of thing for reasons like "not your code"?
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Reminds me of my recent vibe coding project of porting Winamp AVS to web using Emscripten. It worked so well that it was simply.. done after a few sessions, and I was amazed and also feeling fuzzy in the head.One turn involved ChatGPT explicitly fixing C++ source code to fix beat detection for the available audio sources after I complained that it…