Z1M9: Military Base (Knee-Deep in ZDoom)

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Knee-Deep in ZDoom maps
This level occupies the map slot Z1M9. For other maps with a non-standard slot, see Category:Non-standard map slots.

Z1M9: Military Base is the first secret level of Knee-Deep in ZDoom. It is a reimagining of Doom's E1M9: Military Base with new areas and enemies. The primary designer was Ryan Turner (BioHazard). The par time defined in MAPINFO is 9:30.


Map of Military Base
Letters in italics refer to marked spots on the map. Sector, thing, and linedef numbers in boldface are secrets which count toward the end-of-level tally.


Step out of the shuttle then turn left and follow the passage to a door, which leads to the central hub - there are four staircases guarded by rapid fire troopers (and shotgun guys on Hurt Me Plenty (HMP) skill level or higher), as well as a cage full of imps in the middle of the hub. Go down the west staircase (marked 1) and head through the door at the bottom to see the yellow keycard behind a fence, then walk round the fence to collect it.

Return to the central hub and go down the south staircase (marked A) then open the door at the bottom to find the blue keycard behind a forcefield. Head east down a second staircase (marked 2) and go through the door at the bottom to find the red keycard which is guarded by two soul harvesters, joined by troopers, dark imps and a rocket zombie on HMP and two shotgun guys on Ultra-Violence (UV) and Nightmare (NM). Take the red keycard and the metal wall behind it will fade away to reveal rocket zombies (and shadows on HMP or higher); kill them then return to the blue keycard and head west down a staircase marked 3. Open the door at the bottom to confront more soul harvesters (plus shotgun guys on HMP and two rocket guys hiding in the north-east corner on UV and NM), then look in the south-west corner to find some barrels in front of a button.

Pressing the button deactivates the forcefields around the blue key; go back up the staircase and kill the mauler demons that have spawned around the blue key, then pick it up before returning to the central hub. Head down the north staircase (marked 4) and go through the door at the bottom to a storage room with demons, imps and shotgun guys then go through the door in the north wall and follow the tunnel past some demons and imps to another door. Behind this door is a walkway over a nukage trench which is protected by dark imps; follow the pathway until you reach a switch guarded by stone imps and flip it, then return to the storage room to find that the fences blocking the nukage trench in the north-west corner have been removed. Step over the trench and flip the switch here to lower a lift leading down to a narrow tunnel.

Follow the tunnel until you reach a large outdoor area with demons and blood demons then head to the building in the south-east corner, killing any enemies shooting at you from the upstairs windows. Open the door and kill any waiting enemies then go up the ramp and follow the walkway round to the south-west corner where a couple of dark imps are guarding a switch. Flip the switch then go back outside and head for the north-west corner to another building, open the now-unlocked door and flip a second switch which is defended by a Hell warrior. Go back outside to find that the large doors of the west building have opened to reveal blood demons and more Hell warriors, then go through either door and head south-west to find a tan door with a lift behind it. Ride the lift up to the upper floor and go round the corner to confront some soul harvesters, then head east over a bridge to find chaingunners guarding a final switch. Flip the switch then head back across the bridge, where two doors have opened to reveal Hell knights; push past them to a shuttle and press the button inside it to finish the level.

Other points of interest[edit]

Head down the north staircase from the yellow key room to find a rocket launcher and four rockets on a red star. Taking the weapon will cause blood demons to spawn around it.

From the central hub, head down the east staircase to a room with a lift. Press the button on the lift to be taken down to an area with three dark imps - you can get an armor by jumping into the nukage, and some armor and health bonuses by following the north path.

The room behind the blue key door has two more doors on its east side. The south door has a backpack behind it, while the north door leads to a chamber with two Hell warriors guarding an armor and a rifle. Taking the weapon will open three walls to reveal imps (plus dark imps on UV and NM), as well as spawning Hell knights.


  1. From the central hub, go to the eastern room, then look at the northwestern corner to see some crates. Walk behind them to find a super shotgun and a box of shotgun shells; taking the shotgun triggers the secret. (thing 333 via thing 302, ZDoom's "secret trigger" actor)
  2. In the same room as secret #1, walk into the southwestern corner; a lift will take you down to a nukage pool with a platform holding a chaingun, a backpack, two stimpacks and four boxes of bullets. (sector 721) Pressing the ZDoom logo in this secret displays a graphic crediting the designers of this level.
  3. After reaching the large outdoor area before the exit, look north - you will see a UAC logo above you on your right (east), which can be open to reveal a soul sphere. There is a small elevated step around the entrance door - if you stand on it and make a running jump, you will have just enough height to land on the narrow platform underneath the soul sphere. From here you can jump up to the alcove to collect the item. (sector 4246)

Areas / screenshots[edit]


Current records[edit]

The records for the map at the Doom Speed Demo Archive are:

Run Time Player Date File Notes
UV speed 05:54 Andrew Usher 2016-05-22 kdizd_usher.zip
NM speed
UV max 12:29 Andrew Usher 2016-05-22 kdizd_usher.zip
NM 100S
UV -fast
UV -respawn
UV Tyson
UV pacifist

The data was last verified in its entirety on December 12, 2021.


Map data[edit]

Things 907
Vertices 18671
Linedefs 24943
Sidedefs 45375
Sectors 6208


This level initially contains the following number of things per skill level. It does not include things spawned via scripts.

Monsters 1-2 3 4-5
Zombieman 1
Rapid fire trooper 7 10
Shotgun guy 5 19 29
Chaingunner 3 5
Rocket guy 3 6 8
Imp 22 31 26
Stone imp 2 3
Dark imp 15 23 30
Shadow 0 1 3
Soul harvester 12 14 20
Lost soul 8 12 16
Demon 9 15 20
Spectre 0 2
Mauler demon 1
Blood demon 6 9 14
Hell knight 2 5
Hell warrior 6
Satyr 1 2
Weapons 1-2 3 4-5
Super shotgun 1
Chaingun 1
Rocket launcher 1
Rifle 1
Ammunition 1-2 3 4-5
Clip 7
Box of bullets 10
4 shotgun shells 5
Box of shotgun shells 9
Rocket 14
Box of rockets 4
Box of cartridges 1
Health & Armor 1-2 3 4-5
Stimpack 16
Medikit 11
Armor 3
Items 1-2 3 4-5
Armor bonus 28
Health bonus 13
Supercharge 1
Backpack 3
Keys 1-2 3 4-5
Blue keycard 1
Red keycard 1
Yellow keycard 1

Level designers[edit]

Primary mapping[edit]

Secondary mapping[edit]

Tertiary mapping[edit]


  • After walking through the door that leads to the original starting point, look at the left-hand wall to see a thin switch. Pulling it once displays a message suggesting you pull the switch again for a surprise. Pulling the switch again changes the music being played, and pulling it again returns the music to normal.
  • A laptop can be found sitting on a crate by the east side of the imp cage near the start. Interacting with the laptop displays a message identifying it as a ThinkPad 600 left by BioHazard.

External links[edit]