Phantasy Star IV: The End of the Millennium (Japanese: ファンタシースター 千年紀の終りに) is the fourth title in the popular RPG series Phantasy Star, developed by SEGA. It follows events from Phantasy Star II by showing what happened to the great civilization developed in the Algo system after the demise of the Mother Brain and destruction of Parma. The game has been met with generally positive reviews since its release.