Phantasy Star Ø (Japanese: ファンタシースターZERO) is a Nintendo DS game in the Phantasy Star series, developed and published by Sega. The game was released in Japan on December 25, 2008, has release date in North America of November 10, 2009 and was released in Europe on February 12, 2010. The game expands on the gameplay mechanics of online games in the series, such as Phantasy Star Online, but also features an offline general story mode.