Final Fantasy XI (ファイナルファンタジーXI Fainaru Fantajī Irebun?), also known as Final Fantasy XI Online, is a massively multiplayer online role-playing game (MMORPG), developed and published by Square (later Square Enix) as part of the Final Fantasy series. The setting of Final Fantasy XI is the world of Vana'diel, a rich world with diverse climates, ranging from northern glaciers and southern deserts, to ethereal realms and sky landmasses.