It's battleships, but designed for single-player. To give it some appeal to being played alone, rather than just guessing potluck where the enemy ships are when you miss you get a sonar sound. The shorter the sound the closer you are to a ship! With that said, however, it still basically just boils down to guessing at random, and for some strange reason the cursor is not grid based despite Battleships obviously being a grid-based game. The two-player disappointingly is not traditional battleships either, you simply take turns against the CPU using the sonar.