Opus 5.5 builds an open-world racing game for the browser
Claude Opus 5.5 generated a full cyberpunk night-city racing game with drifting, nitro, missions, a garage, a radio and 94 achievements, all running in a browser tab.
I built a full open world racing game with Claude Opus 5.5. It runs in a browser tab. No download, no launcher. You open a link and you're driving through a neon cyberpunk city at night. Here's what's inside: 1. The city Rainy streets, neon signs, a night that actually feels like night. Built with Three.js, so it all runs in the browser. 2. The racing Drift, nitro, manual gears, camera switch. Drifts stack into combos, and there's a live speedometer and a minimap. 3. Missions Races against the clock. Reach the finish in under a minute. Deliver glass cargo without wrecking it. Chain a 2,500 point drift in one breath. 4. Garage Finish missions, unlock new cars. Some look like they drove straight out of a movie. 5. Radio and achievements Yes, there's a radio. And 94 achievements to chase. But the moment that got me was the very first message. A voice pops up on screen: "Got a fare for you, rookie." That's when it stopped being a tech demo and became a game.