Silent Depth

You command a submarine that is powerful but nearly blind. Passive sonar is how you search for a convoy, and each run is a short extraction roguelite. A run follows one order: find the convoy, line up a torpedo attack, then get away.

Raising the periscope or surfacing gives you information, but it also makes you easier to detect. Periscope targeting is how you line up the shot, and the convoy routes are procedurally generated, so each run sends you after a different path.

Once you fire, escorts pursue you, and you have to disappear before they lock onto your position. The creator built the game around surviving the pressure after the shot rather than only sinking the ship, with one-hit tension throughout.