Zunou Senkan Galg

Zunou Senkan Galg ("Brain Battleship Galg"), referred to as just Galg by the game's title screen, is a vertical-scrolling shoot-em-up in which the player must navigate a serious of canyon-like environments for missing pieces to a war machine.

Each stage has at least one piece, so the player must visit them all in order to find the necessary number. In addition to this, there are numerous secrets hidden throughout the many stages of the game, and the player frequently has to choose between multiple paths which lead to different stages.