After passing through the Gate of Divum, the Doom Slayer finds himself outside the walls of Immora, the first city in what would later come to be known as Hell. Wearing a large suit of armor and standing watch over Hell, the Dark Lord calls forth his armies to charge at the Doom Slayer. As he prepares for battle, portals begin to open up behind the Slayer and the remaining Night Sentinels - led by Commander Valen - pour through ready to fight at the Slayer's side. With the Night Sentinel army at his back, the Doom Slayer fights his way through Hell, passes through the wall and enters the city of Immora. Here, he makes his way to the tower at the center and drops into the throne room at the center of Hell.