You defend a compact underground substation against three waves of hovering sentries. The carbine has recoil, a red-dot sight and a limited magazine, so aim carefully and reload between bursts. Pipes, pillars and equipment break up the room while moving lights reflect across its wet floor. The escalating waves make a short, focused encounter; a desktop mouse and keyboard are required.
How the creator made it
WquGuru used Claude Fable 5.2 in Claude Code for four independent experiments inspired by Saltline, ending with this FPS. They constrained it to one HTML file with no external models, images or audio. The creator reports 40.8 minutes and 73 unattended turns, using subscription allowance equivalent to $15.96 at API rates. They published the prompts, scripts and token accounting, and describe browser screenshots and an automated three-wave check during development.
From their post on X ↗ and 2 pages on GitHub (1 ↗ 2 ↗).
The prompt
Build me a FPS. Insanely detailed quality pls, something that looks visually like it can keep up with AAA.This is part of the prompt; the creator didn't share all of it.
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The game and its prompt belong to @wquguru. Preview recorded by us. Made this game? Here's how we list it.