Adrift

Adrift is a short, tense ocean-survival game. One in-game day lasts eight real minutes. Thirst is the clock: catch rain squalls with the canopy open (and pay for it in nerve), run the solar still, and when everything else is gone - there's always the U key.

Ships pass. Nobody announces them. Keep watch through the door and portholes, and when a silhouette crosses the horizon, decide: is this pass close enough to spend a flare on? Smoke is for daylight, flares carry at night, the parachute rocket is almost always seen — and you have two of each. Fire at the closest point of the pass; the math genuinely rewards it. 

Sharks are drawn to an open door and a line in the water. Thunderstorm waves wash gear overboard. Sleep costs real hours — a ship can pass while you dream. Go mad enough and the game starts lying to you about what's on the horizon.

Death and rescue both end the run and record your days survived. There is a strobe toggle for the purists chasing endurance records with no rescue.