At first glance, Steel Diver might look like a fairly standard side-scrolling shmup. Truth be told, its an extremely challenging side-scrolling ... well, it's part shoot-'em-up, part submarine simulator and part strategy game. The sum of these parts is actually a lot more compelling than the game taken at face value.

Putting the 3DS' capabilities to thorough use, Steel Diver presents a side-view slice of the ocean that's as deep into the screen as it is from the surface to the ocean floor. It's in this miniature sea within your handheld -- complete with schools of fish, air bubbles and volcanic vents -- that you pilot three submarines, each with their own strengths and drawbacks, on increasingly difficult missions.