Galaga & Galaxian ROM Download for Gameboy (GB) on Emulator Games. Play Galaga & Galaxian game that is available in the United States of America (USA) version only on this website. Galaga & Galaxian is a Gameboy emulator game that you can download to your computer or play online within your browser. You can also download free ROMs such as Galaga, Galaga and Galaga [h1] as shown below. Galaga & Galaxian works on all your devices in high quality.