The Galaxian universe (ギャラクシアン, Galaxian) is a series of famous fixed shooters developed by Namco. The series revolves around the player in a spaceship who must shoot all of the enemies of an alien swarm. The second game in the series, Galaga, is among the most successful arcade games of all time.
Various elements from Galaxian appear in Super Smash Bros. 4, most notably the Boss Galaga item.
The Boss Galaxian "fruit" and tractor beam both reappear as part of Pac-Man's moveset, as do the three Namco Roulette cameos.
Boss Galaga also appears as a spirit.