Saltglass Descent

You are a salvage diver working your way down a lighthouse that sank in a storm forty years ago. Oxygen is the only resource: it keeps you alive, it buys upgrades from the drowned keeper's ghost, and it powers the harpoon. Spend too much on a new fin and you will be swimming back up on fumes. Floors reshuffle every run, but the keeper's logbook keeps what you have learned.

The art is murky teal and lamp-yellow, drawn in thick ink lines, with a soundtrack of muffled bells. A first clear takes about 12 hours and there are three deeper endings after that. Anyone who loved counting their last few hit points in a tough roguelike will feel right at home. Fair warning: the early floors are slow until you unlock the second tank.