ファンタシースターオンライン
is a series of console role-playing video games and other supplementary media created by Sega. The series debuted in 1987 on the Master System with "Phantasy Star", and continues into the present with "Phantasy Star Online 2" and other extensions of the "Phantasy Star Online" sub-series. Each of the games in the series features a science fantasy setting featuring a cross-genre combination of magic and technology.