Apple II
Developed by Atarisoft in 1983.
Atari 2600
Developed by Atari in 1983. One of the few 2600 games to ever come out after the Atari 5200 versions.
Atari 5200 & Atari 400/800/XL/XE
Developed by Atari in 1982.
ColecoVision
Developed by Atarisoft in 1983. Not only is it surprisingly accurate (even more so than any of the Atari conversions,) it features diving Galaxians with "flapping" wings, an enhancement missing from the original arcade game.
Commodore 64
Developed by Atari in 1983.
Commodore VIC-20
Developed by Atari in 1983.
Game Boy & Super Game Boy
Developed by Namco in 1985. Sold on a single cart along with Galaga. Published by Nintendo of America in the U.S. as number 3 in the Arcade Classics series. Compatible with the Super Gameboy adapter for the Super Nintendo. Super Gameboy screenshot and border shown here.
MSX
Developed by Namco in 1984. Published by Bug Byte in the United Kingdom. Note that the bottom Galaxians are green instead of blue.
NES
Developed by Namco in 1984. The very first Famicom game that Namco developed. Note that the bottom Galaxians are green instead of blue.
Noteworthy
Apple II
Programmed by Suzuki for the Apple II, and published by Broderbund in 1980. Originally entitled Galaxian, the name was changed to Alien Rain to avoid a lawsuit. An enchanced version called Alien Typhoon, released the following year, features more aliens, but also more slow down. Generally considered better than Atarisoft's official Galaxian port.
Atari 800
Programmed by Anthony Weber in 1981 for the Atari 400/800 computer. Generally considered better than Atari's official Galaxian release. Features less annoying sound effects.
Bally Astrocade
Developed for the Bally Astrocade by programmers at Bally Midway. Although Midway had the distribution rights to Galaxian in the arcade, they did not have the home rights to the title. They produced this version and renamed it, although it still appears as Galaxian on the menu screen when the system is turned on.
Commodore VIC-20
While Atari had the rights to release Galaxian for computers in the United States, HAL Laboratories had the rights in Japan. They created this version of the game which was more accurate than the Atarisoft version. Commodore changed the name to Star Battle to avoid legal problems.