Space DemonsJoin the High Commander as the eternally loyal Green in an epic journey to save the Blues from the menace of the Greys and their evil Red Gems!Combat15 missions of nerve-racking, spine-shredding, brain-blasting, planet-shattering, ground-breaking combat!Engaging, thought-provoking, mind-bending, conscience-warping plot!Enjoy 30 minutes of Space-Invader-Style shoot-'em-up entertainment.