SinkSub Pro

SinkSub Pro is a variant of Depthcharge and an expanded version of SinkSub. The player controls a battleship that can move left or right at the top of the screen. Beneath the waters, a number of enemies (mostly hostile submarines of various kinds) appear. The player can drop depth charges from the left or the right side of the ship, which instantly destroy an enemy if they make contact. A certain number of depth charges can be active at a time. The enemies attack with a variety of weapons, such as floating mines or missiles, and the player loses a life if his ship gets hit.