( sector 21) In the outdoor area beyond this door ( F) there is a soul sphere and a chaingun (and, on UV and NM, a crowd of sergeants).

The switch in secret #1 opens a door in the northern steps which lead up to the tower with the red key.

Opening this door reveals a room ( E) with a switch, a medikit, a green armor, and a backpack.

The construction in the center of the first room has a secret door on its east side this can be seen from the fact that the texture on the wall is different at this point.

On ITYTD and HNTR, there is a blue armor at the base of the lift north of the slime walkway. If you then step forward into the small room, you can see the chainsaw (secret #3) through a window. The alcove is really a fast-moving lift which drops you next to an imp (ITYTD and HNTR) or a trooper and an imp (HMP, UV, and NM). Or simply memorize the total number of enemies in the maze (5 on I'm too young to die and Hey, not too rough, 14 on Hurt me plenty, 23 on Ultra-Violence) and count them as they die.ДЄt the top of the staircase leading to the slime walkway, there is an alcove on the west side ( M). Use the automap to make sure you look into every passage (thereby alerting every deaf monster sooner or later), then stand and listen for the breathing/gurgling sounds of survivors.

This area contains a large amount of ammo, but can be frustrating due to its lighting and its convoluted floor plan, especially if you are trying to get 100% kills. Pressing the switch opens a door to a maze across the hall ( H). Going down this corridor reveals a room with a switch ( G) surrounded by slime. Just past the red door, there is an opening on the right-hand side. It leads to a shelf containing a box of bullets and a medikit ( P). There is a lift in the southwest corner of the first room. On Ultra-Violence and Nightmare!, it is guarded by an imp who is difficult to see with the status bar displayed (the passage is too narrow for you to step back and look up), unless you actually step onto the lift and expose yourself to his attacks. The west side of the passageway includes a lift leading to a shotgun ( O). There is a construction in the center of the first room, with a passageway in the middle.

Go down the small lift in the exit room ( D) and press the exit switch. Go into the passageway which opens, and down the stairs to the right. Travel downwards on the lift and press the switch on the far wall. Go through the room with the slime to the lift ( C). Travel to the opposite side of the room and go through the red door. Go back down the stairs to the room you started in. Go through the door in front of you and up the stairs. Essentials ДЇrom the start point ( A), walk forward past the barrel and turn right. Sector numbers in boldface are secretsВ which count toward the end-of-level tally.

Letters in italics refer to marked spots on the map.

Doom nuclear plant secrets