The First Rikti Invasion was a war which shook the Primal World in a profound way. While Paragon City took the worst of it, and has since received the most investment in terms of repairs and recovery, there are still places throughout the world which bear the scars from that terrible conflict. The Omega District is one such area, so named for it once housed the headquarters of Omega Industries. Repairs to the area have been exceptionally slow due to a persistent and pervasive fog. Some say that the underground facilities of Omega Industries are still operational, and even that they're the source of the fog.