Steel Diver sends 3D gameplay under water as players take control of three different submarines and explore the briny depths, avoiding mines, battling enemy ships, and fending off giant sea creatures. The action is controlled via the 3DS's touch screen and internal gyroscope, but each vessel offers a different set of controls that gamers must master, and three different game modes help keep the action fresh. "Missions" mode is a fast-paced shooter that requires players to control their ship's speed, depth, and pitch while they travel through branching underwater pathways, fire torpedoes at enemies, and use the stylus and touch screen to fix any leaks that arise. "Periscope Strike" uses the gyroscope to let players effectively take on the role of a periscope, rotating left and right to find enemies and fire torpedoes. And multiplayer fans can join a friend for "Steel Commander," a top-down, turn-based strategy game in which two local gamers move submarine fleets around the map in search of enemy ships.