In the past couple of weeks, hundreds of vibe-coded, AI-decompiled emulators and games have appeared out of thin air. Why? Because Claude’s latest update, Claude Opus 5.5, is extremely good at decompiling.
The short of it is that a game’s source code can now be compiled and reconstructed in record time—something that used to take coders months to achieve. All of those “native” Fallout and Call of Duty: Modern Warfare ports and those AI-generated Super Mario 64 inside Elden Ring mash-up mods you may have seen are a direct result of this.
However, I think today’s example is far and away the most concerning development so far, because I’m forced to admit that these AI-decompiled web browser ports of Call of Duty: Black Ops, Halo: CE, Grand Theft Auto: Vice City, Skate 3, and The Simpsons: Hit and Run actually seem to run very well.
