E2M2: The Ogre Citadel

The Ogre Citadel is the second level of The Realm of Black Magic. As the name suggests, it's a large and heavily defended fortress, filled with Ogres and other hostile creatures. It also features an extensive system of Water canals, starting from the moat and extending all the way to the exit room.

The player can search for the Gold Key, but does not need it in order to proceed if they follow the corridors in the Water. In fact, most of the level can be ignored if the player desires just to get to the next level and skip collecting items. This level also brings back Fiends, Knights, Zombies, Ogres, and Shamblers on Normal and higher difficulties. The starting area and main building are connected by a small drawbridge over a moat of Water.

Quick Level Completion

 * Follow the corridor to an outside area.
 * Shoot both Buttons to lower the drawbridge.
 * Follow the corridor to an intersection, the right being the Gold Door.
 * Follow the straight corridor to the Gold Key.
 * Return to the intersection and go to the Gold Door.
 * Follow the staircases to the left until you reach a Button.
 * Return to the Gold Door.
 * Open the Gold Door and cross the newly raised floor.
 * Follow the corridor to the exit.

Walkthrough
Kill the Knight  and collect a 15 Health. Follow the stairs down to an outside area and collect the Green Armor to the right and the Shells to the left. Shoot one of the Buttons on the opposite side of the cliff with Water at the bottom, and kill the Fiend that jumps out of the Door. Shoot the other Button, and cross to collect the Shells and Rockets. Proceed forward until you reach a painting on the left and a corridor to the right. Turn right and proceed forward. At the end of the hallway turn left and collect the Double-Barrelled Shotgun on the opposite side of the corridor. Turn left, then proceed forward to collect the two 25 Health. Turn right to kill 2 Knights, then proceed forward up a flight of stairs. Kill an Ogre on an alcove straight ahead, then collect the two 15 Health to the left. Turn right to the Gold Door and collect the Shells. Follow the next pair of stairs down, kill the Ogre, and collect the 25 Health to the right. Go forward, collect the Shells, and go up the next pair of stairs to the left. Go down the hallway while collecting the Shells and go up the stairs at the end. Turn right and kill the 2 Knights in the next hallway. Press a Floorplate to make a Moving Platform with a Fiend start lowering and raising, which you can shoot through the window. Continue down the passageway to get to the alcove the Ogre you killed earlier was on. Collect the Nailgun at the top of the stairs to the right. Turn right and once through the doorway left to kill a Knight in the room, plus an Ogre and Fiend on another platform farther on. Grab the Quad Damage in the room, and then go to that platform. Just before you jump to it you will collect some Shells at the end of the platform you were on. Collect the two 25 Health and Shells, and then press the Button, which will open a gate on the lower floor. Drop through the hole on the right to reach the room beside it, and kill the Ogre. Collect a 25 Health, and then go into the alcove where the gate was unlocked to collect the Nails, 25 Health, and Gold Key.

Shoot the Button just below the hole you dropped through to open a gate at the opposite side. Collect the Nails in the next room. Go towards the opposite side of the room from the entrance and the Wall will lower, revealing an Ogre. There is an Ogre in the opposite building seen through the window to the left, and a 15 Health at the end of the hall, as well as a corridor leading back to the room right before the Gold Door. Jump out the window and follow the platform around to a Yellow Armor. Go into the building and turn right to get where the Ogre was  (#1) . Drop into the Water and swim right, and at the end turn around and climb the stairs to the right of the entrance to collect a Grenade Launcher  (#2) . Backtrack to the outside area at the start of the level with the two Buttons to shoot. Drop into the Water below. On the left side of the passageway is a doorway on the right wall with a Zombie inside. Take the Elevator inside and collect the a 100 Health at the top  (#3) . At the end turn left, and then turn right into the next doorway. Kill the Zombie inside, and go to the right of the Elevator, as the Elevator goes back to the start of the main building to an alcove to the right. At the end is the Moving Platform with the Fiend, stand under the Moving Platform for it to lower, and then back up an inch while waiting to climb on to not be crushed. To the left is the Gold Door, as you are now on the opposite side. Go through the right doorway before the platform lowers again. Kill the Ogre, collect the Shells, and climb the stairs. Collect the three 25 Health and Grenade Launcher at the top. Go into the next room and kill the Zombie to the left. Drop to the Water below and kill the Fiend. Go to the middle room and go right, and then go left into a sunken area of the wall to ride an Elevator back to three 25 Health. This time follow the platform in the next room to the Arch.

Differences from Easy to Normal

 * 2 Knights in outside area by start, one to left, one to right
 * Fiend in Water in outside area by start
 * Ogre by Fiend in entrance to main building
 * A gargoyle texture is a Nail Trap near the Double-Barrelled Shotgun, Easy it does nothing
 * 3rd Knight in intersection room by Gold Door
 * Knight below alcove next to intersection room by Gold Door
 * In the hallway in the staircase area by the Gold Door is a Knight and Ogre
 * 3rd Knight in hallway with Floorplate for Moving Platform
 * Ogre by Knight by Quad Damage
 * When Button for Gold Key is pushed, a Wall will move out pushing you into the room below
 * Shambler instead of Ogre by Gold Key
 * Ogre  by window leading to  (#1) .
 * 2 Knights on platform by Yellow Armor
 * 2nd Ogre at  (#1) .
 * After Gold Key is collected, Ogre spawns to left of intersection room by Gold Door
 * Knight by Ogre on right side of Moving Platform
 * 2 Zombies straight from entrance to exit room
 * Ogre to left of entrance to exit room

Differences from Normal to Hard/Nightmare

 * Shells on Strogg Crate by entrance that can be reached by jumping to the nearby Strogg Crate at the bottom of the stairs.
 * 3rd, 4th, and 5th Knight in outside area by start
 * Ogre by Gold Door in Wall alcove that opens up when the player goes down stairs
 * 3rd Knight on Yellow Armor platform
 * No Ogre spawns by Gold Door after taking Gold Key
 * Knight between intersection room to Gold Door and window room leading to  (#1) 
 * 2nd Ogre on right side of Moving Platform
 * Final room is now separated into tiny platforms that must be jumped on to cross
 * Zombie on one of the middle of platforms leading to Arch
 * 2nd and 3rd Zombie to left of entrance to exit room

Differences

 * Thunderbolt and Cells in outside area by start
 * Nailgun just after entrance to the main building
 * No Double-Barrelled Shotgun after Nail Trap, but Cells
 * Double-Barrelled Shotgun in hallway in the staircase area by the Gold Door
 * No window blocking Floorplate from Moving Platform
 * Nailgun on alcove on opposite passageway from Gold Door replaced by Grenade Launcher
 * Rockets on opposite side of Quad Damage room
 * Cells and Red Armor in room across from Quad Damage room
 * Gold Key replaced by Rockets
 * Super Nailgun at  (#1) 
 * Moving Platform does not lower
 * Grenade Launcher replaced with Rocket Launcher
 * 2 Rockets at Arch

Spawn Locations

 *  (#1) 
 * Room with Red Armor
 * Quad Damage room
 * Entrance to exit room platforms
 * Room with Thunderbolt
 * Room with Floorplate and is overlooking Moving Platform