 At the end of each level is a boss ship that the player must destroy.The Terran Fleet is developing a new prototype starfighter, the "RaptorX", and the player is a test pilot of that prototype.Suddenly, the Xidus Armada Fleet, the Terran Fleet's arch enemy (ever since Galactix), launches an all-out surprise attack on the Terran Fleet that catches them with their guard down, destroying all Raptor fighters in the process, but the few "RaptorX" prototypes that were away being tested have survived.