An old horizontally scrolling shoot'em up with a vertically scrolling background. The player has to guide a submarine armed with torpedoes and missiles through five levels while fighting different underwater terrors. At the end of each area the boss-submarine appears.
Main CPU : Zilog Z80 (@ 3.072 Mhz)
Sound Chips : General Instrument AY8910 (@ 1.78975 Mhz)
Screen orientation : Vertical
Video resolution : 224 x 256 pixels
Screen refresh : 60.61 Hz
Palette colors : 114