PAMPERO

1. The grain race home. You have the watch aboard the four-masted barque ORIFLAMME, ninety-one days out with wheat in her holds, running her miles down past the River Plate — the last waters on earth where sail still out-earns steam, and the home of the pampero: a squall that rolls off the pampas as a wall of black sky and hits like a slamming door.

Your engine is an acre of canvas, and it is simulated as actual cloth. Every sail is a spring-mass sheet that bellies, flogs, strains and — if you ask too much of it — tears, seam by seam, while you watch. Speed and catastrophe come out of the same physics: more canvas is more miles, and more canvas is how you lose a mast.

How to play

• W / S — make sail / shorten sail. Orders take crew-time: canvas comes in row by row, and a fighting sail takes nearly three times as long to gather in a screaming wind. Shorten before the squall, not during.
• A / D — helm. Luff to spill pressure, bear away for power.
• SPACE (hold) — let fly the sheets. The emergency valve: dumps the wind out of everything at once and can save the rig — but a flogging sail beats itself to rags, so the valve has a bill.
• Read the instruments. The glass falls before the wind arrives; the pampero shows itself as a black line to windward with seconds to spare.

One watch, six and a half minutes, scored in nautical miles made good — a crack day's run is 280. Finish with all four masts standing and the owners will hear of it; blown sails stay blown for the watch, and dismasted ends the run where it stands, miles still counted. Five badges to earn, one of them hidden somewhere past the point where most watches have already gone wrong.

The twist: the fastest passage is carried at the edge of tearing. The strain is visible in the cloth before it lets go — riding that line, and knowing when to step off it, is the whole art.

How it was made: this drop was conceived and written by Claude Fable 5; the simulation and every line of code were built by a Claude Opus 5 agent — 13 verlet-cloth sails with per-face wind pressure and tear propagation, ship roll dynamics on a real righting curve, a WebAudio gale — in one self-contained file, tuned against scripted pilot archetypes until seamanship beat both timidity and greed, then verified in headless Chromium before shipping.