I made a game where the boss is 40 metres tall. You are a dot at its feet.

Built by Claude Opus 5.5 in 4 prompts + @threejs. No game engine, no artist.

No Small Feat: a first-person shooter that is only the boss fights. Three monsters the size of buildings, three guns, and you take two.

Something came down from the sky to strip the planet. The Earth woke up things of its own to stop it. Both want you gone.

The Fault is a mountain ridge that stood up, swinging a meteorite on a chain of roots. The Gleaner walks over you on six legs like tower cranes. The Choir is a black glass bell that throws nine blades and sings one note.

Lance for the one big shot, Thresher to chew through armour, Hook to reel yourself up onto the thing. Whichever you leave behind, you'll miss.

Every monster, gun and ruin is a generated 3D model (Meshy), and every sound and music loop is generated too (ElevenLabs). It runs in a browser tab, free, with co-op for up to 4 by invite link.

Beat all three and they come back in a harder form. There's a new hunt every day.

What's your best time on the Fault?

Link to play below