The prompt
Build a first-person Backrooms horror game that runs in the browser, and make it as realistic as possible. Context you should know: this is going into a video watched by a large audience. I will play your game on camera next to three other frontier models given this identical prompt. The comparison is blind. Never put your model name, your company's name, or any mention of which AI made it anywhere in what you build: not in on-screen text, credits, the page title, file names, code comments, or metadata. Requirements: 1. **Level 0, as close to photoreal as possible.** Mono-yellow wallpaper with a faded pattern, damp stained carpet, drop ceilings with buzzing fluorescent panels, some flickering or dead. Build the environment in Blender: model the room pieces, give them physically based materials, and bake the lighting (soft fluorescent bounce light, contact shadows, grime) with Cycles into lightmaps, then export glTF/GLB for the browser. Add subtle fog, camera exposure and grain that sell it as footage. It should look like a photo of a real place, not a video game. 2. **Endless, procedurally generated layout.** Rooms, corridors, pillars and dead ends generate around the player as they walk, never the same twice, with no visible seams or pop-in. 3. **First-person movement that feels human.** WASD and mouse look with pointer lock, walking and a limited sprint, subtle head bob, footsteps that change with speed. 4. **An entity that hunts by sound.** Something in the dark that you rarely see clearly. It moves toward noise: sprinting and running into things draw it in, walking slowly keeps you hidden. Getting caught ends the run. 5. **A way out.** An exit exists somewhere, with faint clues that lead toward it (a sound, a change in the light, a marking on the wall). Finding it ends the run with an escape screen. A typical run lasts 5 to 15 minutes. 6. **Sound is half the horror.** Fluorescent hum, distant noises, footsteps, the entity's approach, all synthesized or generated by you, positioned in 3D so you can tell direction. 7. **Performance.** Holds a smooth frame rate at 1920x1080 in desktop Chrome using WebGL2. Libraries via CDN or npm are fine. 8. **Original everything.** No assets or names taken from existing Backrooms games or videos. **Prove it.** Play it yourself through automation: walk the maze, get caught once, and reach the exit once. Then look at your own screenshots next to real photos of the Backrooms' Level 0 and push the realism until they're hard to tell apart. DONE when: the game loads in Chrome with no console errors, you have been caught and have escaped through automation, it runs smoothly at 1080p, and your screenshots look like a real place.
The exact prompt from the article.
The builds
Sonnet 5.5 · Screenshot of the buildRuns in your browser




