It was released by Namco in 1981 the US version was released the same year under license to Midway (and later ported to the Nintendo Entertainment System to Bandai (now merged with Namco to form Bandai Namco Entertainment) and the Game Boy game systems (under license to Nintendo) along with Galaxian). is a fixed shooter arcade game and the sequel to Galaxian.
Galaga note pronounced ga-LAG-a, per Word of God.