Map 19: The Citadel

Immediately upon level start, turn left and eliminate the nearby Arachnotron.

From the Arachnotron's position, look right to see a barred window on the starting building. Shoot through it to kill Shotgunners and Imps inside.

From the same window, look north to see a high window in the wall left of the bridge. Use the Chaingun or Rocket Launcher to dispose of the Imps firing from there.

Return to your starting position and go around to the right side of the building. Fire into the side windows and the larger building across the bridge to eliminate more Imps.

Enter the building you started in front of. First, go through the left opening to collect Stimpacks, Shotguns (dropped by previously killed Shotgunners), and spare Shotgun Shells. Kill any remaining enemies inside.

Go back and enter the other doorway with the gargoyle head. Kill any remaining Imps in this room, grab the items, and flip the switch on the back wall to lower a plinth blocking the main citadel entrance.

Exit the small building via its north door and cross the bridge to the island with the main citadel.

Open the wooden front door and be ready to shoot down a Cacodemon and two Lost Souls.

Grab the Box of Shotgun Shells and Armor Bonuses in front of the door and proceed up either staircase.

Enter the west door of the three doors upstairs. In this large room, quickly grab the nearby Box of Bullets and kill the Imps high up in the window opposite the entry point.

Flip the switch on the plinth in this room to open the other doors. Take the door leading south (beside the window where the Imps were).

Go through the passage and the next door to reach a small compartment. Kill any Imps here (some may have been shot from outside).

Grab the Stimpack and Box of Bullets if needed, and flip both skull switches. The south wall switch re-opens the entrance door; the other lowers a wall to reveal a teleporter. Use the teleporter.

In the dark room, turn around to see an opening and stairs. Quickly run to this opening, hug the right wall, and follow it to a Berserk pack. Grab it but do not fall off the ledge.

Turn back and use your enhanced fist power to punch out a pack of Pinky Demons, conserving ammo.

After killing the Demons, return to the previous room and grab the Health Bonuses scattered around.

Go back through the opening again, and this time follow the left wall. As you approach a raised wall, the floor will rise, allowing passage.

Ahead, on another raised passage, you will see Demons. You can pick them off from here if you have Bullets or Rockets.

Halfway along this passage, drop down the hole on your left (opposite an opening on the right). Equip your Berserked Fists, Chainsaw, Super Shotgun, Chaingun, or Plasma Gun.

You will land at the back of the citadel. Grab the Megaarmor nearby and kill the large group of Spectres. The alcove you are in will prevent multiple enemies from attacking at once.

After killing all Spectres, grab the Megaarmor if your armor is low, or leave it until the end for a potential 200% armor total.

Grab any loose health and ammo. Head left (west) around the citadel perimeter.

Around the corner, collect Health Bonuses and snipe Imps inside the barred window with the Chaingun or Rocket Launcher.

Continue west along the perimeter. Snipe Imps in the barred windows on the western side, then collect Stimpacks, Bullets, and Shotgun Shells.

Continue around the citadel to the south entrance. Head back inside to the room with the plinth switch and the window where Imps were. Hit the switch again.

QUICKLY go through the south door again (leading to the skull switches). As you pass silver panels on the corridor walls, a door will open. Turn back and head out the way you came; a hidden doorway will have opened on your left.

Shoot down the extra Imps in this new room and head inside, collecting Clips and a Stimpack on the right. Follow the hallway around a bend and up stairs.

Have your Super Shotgun ready as you approach the wall; it will lower to reveal an Imp, and a Spectre will teleport in behind you. Shoot them.