Galaxian is a legendary single-screen shoot-em-up that took everything that made Taito's ground-breaking "Space Invaders" so good, and improved upon it on every level. Each screen starts with a wave of multi-coloured aliens moving left and right at the top of the screen; the aliens quickly break ranks and start dive-bombing the Galaxip (player's ship)either in single units or in groups of 3dropping multiple missiles as they descend. All of the aliens need to be destroyed before the player can progress to the next wave.
This was the first video game released with 100% of its graphics displayed in true RGB color. (arcade-history)