Arcade Game: Gaplus (Aka Galaga 3) (1984 Namco)

A shooting 'em up game sequel to Galaga. You can use Tractor Beams to capture up to 6 enemies to fight in your side and you get a multi-shooting for more points. To get the Tractor Beam, you must shoot the aliens who mutated into a more mature form. You can also move up and down in addition to move left and right. Note: Used Invincibility cheat after down to last life. The game is endless so I played as far as I can. I quit afterwards.