Steel Diver (スティールダイバー) is a submarine action-adventure game developed and published by Nintendo for the Nintendo 3DS. The game follows the adventures of a submarine captain as he navigates through treacherous waters and battles enemy submarines. The game features three different game modes: Periscope Strike, Steel Commander, and Sub Wars. In Periscope Strike, the player must navigate their submarine through various levels, avoiding enemy fire and obstacles while trying to destroy enemy ships. Steel Commander is a turn-based strategy game where the player commands a fleet of submarines against an enemy fleet. Sub Wars is a multiplayer mode where two players battle it out in an online arena. Steel Diver features detailed 3D graphics and realistic submarine physics, giving players an immersive experience. The game also features an intuitive control system that allows players to control their submarine with the stylus or the Circle Pad. The game also features a variety of missions and challenges to complete. Overall, Steel Diver is an exciting and challenging submarine action-adventure game that will appeal to fans of the genre. With its detailed 3D graphics, realistic physics, and intuitive controls, Steel Diver is sure to provide hours of entertainment.