Xexyz

It's the year 2777. Due to nuclear wars and natural disasters, Earth's population has decreased dramatically and only five island are left, forming the nation of Xexyz. In Xexyz, humans, spirits and faeries have lived peacefully for centuries under the reign of King Xeu Star. One day, Xexyz is attacked by Goruza who murders the king, builds mechanical castles on each island and captures the queen of each island. You take on the role of a soldier named Apollo who wants to put an end to Goruza's reign.