In 2047, an unknown alien life-form descends upon the Earth, destroying all the major cities in one fell swoop. The survivors unite and build a Diffusor to stop the invaders, and a temporary peace is achieved. Jump forward to 2053, the present. A last, desperate counterattack is being mounted against the enemy. Hiroshi Akishima, soldier in the Planetary Defense Forces Alliance, would like nothing better than a shot at the aliens responsible for his...