- This level occupies the map slot MAP30. For other maps which occupy this slot, see Category:MAP30.
You start on a Balcony on the SW of the Map and on the SE there is a Shotgun, Chaingun and Super Shotgun plus plenty of Ammo. The main entrance door is guarded by a Baron of Hell surrounded by Barrels whose explosions can usually kill the Baron. Inside the Building is The Icon of Sin and two Cacodemons. The Icon spits 6 cubes at a time and the cubes are spat from the sides of the Icon and it cannot be defeated in the usual way. Below is a huge pit of Lava and a Door in the NW part of the map and a bridge must be raised to gain access to Romero's Head. Climb to the top of the staircase and shoot the Icon of Sin with the Shotgun or Super Shotgun, two switches are revealed, one of them raises a bridge and the other opens the door. Once these actions are complete, the level is easily beaten as you go inside the Icon of Sin to destroy its Brain up close which is guarded by a Trooper, who is the last enemy in the megawad.