For the first time, humanity is doomed to be snuffed out by the forces of the Dark Legion. Algernoth and his forces emerge from their portals and establish citadels across the solar system. The megacorporations, desperate to retain power, have unleashed the Doom Troopers to cleanse the solar system of the Dark Legion. Their mission is to [eventually] force Algenoth back through his portal, trapping him in the Dark Symmetry.