Phantasy Star ROM Download for Sega Master System (Sega Master) on Emulator Games. Play Phantasy Star game that is available in the United States of America (USA) version only on this website. Phantasy Star is a Sega Master System emulator game that you can download to your computer or play online within your browser. You can also download free ROMs such as Castle Of Illusion Starring Mickey Mouse, Lucky Dime Caper, The - Starring Donald Duck and Alex Kidd - The Lost Stars as shown below. Phantasy Star works on all your devices in high quality.