A one-breath free-diving roguelite set on fictional Hawaiian shipwrecks. Sink through a drowned hull on a single breath of air: every fathom of depth doubles the value of the cache below, and at each landing you choose — push deeper, or bank what you carry and swim for the light. Black out before you surface and the sea keeps everything in your hands.
The tension is real free-diving physiology. Oxygen burns faster with depth and effort, ascent takes longer than you think, and shallow-water blackout — losing consciousness in the last few fathoms, when the pressure change is steepest — is the hazard every trained freediver plans around. The game's O₂ meter, ascent estimate, and blackout rule are all built on those ideas.
All wrecks in the game are fictional. Real wreck diving requires training, a buddy, and redundant air — and real black coral is a protected, regulated species. Admire it where it grows.