2082 AD: largely because of high-speed information technology all of the humanity has united under one centralized government. With world peace achieved, all worldwide military are grouped into seven branches, called "Spectrums" and de-activated.
2087 AD Earth is under attack by unknown aliens code named "Norn" Efforts by the military to prevent "Norn" expansion using the now out-of-date military divisions spectrums 1 through 7 have failed. The united government has now developed last alternative resort. A prototype robotic exo-suit defense squad designated "Spectrum 8" As "Alpha 1", your mission is to penetrate to the core of the enemy occupation zone, seek and destroy the enemy space port - This will allow the remaining spectrum 1-7 units to deal with the after-math.