Classic of the classics, it is a game developed by Toshihiro Nishikado. The player pilots a vehicle on the surface of the planet moving it horizontally only protected by four barriers that each time they are hit decrease their effectiveness. At the top is an (ordered) horde of invaders who shoot and come zigzagging in unison to conquer the land. The aim is to shoot and destroy all invaders, perhaps even hitting some UFOs that sporadically cross the screen. Each level consists of a single wave of invaders while the game ends when all lives are lost.

The cabinet in the collection is the classic Midway up-right (manufacturer of the American version of this game). The wood conditions are excellent, as well as the brightness of the monitor and the state of the internal parts. The silkscreen of the glass shows cracks that have been fixed permanently. The restoration involved the glass and metal parts as well as a general cleaning. The control panel is stunningly beautiful.