Fantasy Earth Zero is a massive multiplayer online role-playing game developed for Microsoft Windows. Originally developed by Puraguru (Vanillaware) and Multiterm under the title Fantasy Earth: The Ring of Dominion, it released under that title in February 2006 by Square Enix as a paid product through its PlayOnline service. It relaunched under Gamepot as a free title, and is currently handled by developer SoftGear and publisher Square Enix. Under the premise of a world where rival kingdoms engage in frequent conflicts, players choose an allied kingdom and fight against each other in groups of up to fifth players.