Fantasy Earth Zero was a 2006 massively multiplayer online role-playing game developed for Microsoft Windows. Originally developed by Puraguru (now known as Vanillaware) and Multiterm under the title Fantasy Earth: The Ring of Dominion, it was released by Square Enix as a paid product through its PlayOnline service. It relaunched under Gamepot as a free game, and was later 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 fifty players. The game closed down in September 2022.