Zillion II - The Tri Formation ROM Download can be obtained free for Sega Master System on EmuGames.net only. Play emulator game in English for the USA region. Zillion II The Tri Formation is a Sega Master ROM that you can download to your computer or play online within your browser. You can also download roms such as Street Fighter II Turbo and Crisis Core Final Fantasy VII that work on all devices including desktop and mobile. Be sure to rate the game if you enjoyed playing this ROM.