E1M4: Quarantine Zone (Doom the Way id Did: The Lost Episodes)

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DtWiD: The Lost Episodes maps
Knee-Deep in the Dead
The Shores of Hell

M1 M2 M3 M4 M5 M6 M7 M8 M9


M1 M2 M3 M4 M5 M6 M7 M8 M9

Thy Flesh Consumed

M1 M2 M3 M4 M5 M6 M7 M8 M9

Base Instinct

M1 M2 M3 M4 M5 M6 M7 M8 M9 M0

The Final Gate

M1 M2 M3 M4 M5 M6 M7 M8 M9

This level occupies the map slot E1M4. For other maps which occupy this slot, see Category:E1M4.

E1M4: Quarantine Zone is the fourth map of the Knee-Deep in the Dead episode in Doom the Way id Did: The Lost Episodes. It was designed by Lorenzo Davia (Ultimate Lorenzo).


Map of Quarantine Zone
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.


You start in a square room with a cross-shaped column. Kill any approaching zombiemen then go through either of the northern doorways and follow the passage past some demons and zombies until you reach some steps going down. Descend the steps and kill an imp and shotgun guy waiting at the bottom, then walk east into the next room and then west to find the blue keycard. Taking the key will open a monster closet to the east with three imps, a zombieman and a shotgun guy.

Go back to the starting area and open the south door to face two zombiemen, then continue into the next room and blow up the barrels here to kill a spectre and other monsters (note the red door in this room for later). Walk west to see two passages and follow either of them to a room with a blue door, go through it then head north past some zombies until you get to some blue steps. Go down the steps, turn left to kill some shotgun guys then turn left again to get the red keycard.

Go back to the red door you passed earlier and open it, kill some waiting shotgun guys then walk south to a lift that goes down to the floor below. Head north until you see a doorway to your left, pass through it to reach a nukage pool then head due north to a blue staircase. Climb the stairs then head east past some monsters to the opposite corner of the room, then look north-west to see the exit door along with two imps. Open the door and press the button behind it to finish the level.

Other points of interest[edit]

Enter the nukage just before the exit area then go to the south-east corner to find a box of bullets and a megaarmor.


  1. In the starting room, press on the wall behind the shotgun to find a dark passage with health bonuses, a medikit, a box of bullets, and an imp. (sector 173)
  2. Grab the blue key to open the eastern closet. Go to the medikit in the back to lower a lift. On the other side is a light amplification visor. (sector 69)
  3. Ride that same lift up and go north to get a backpack. (sector 107)
  4. In the room before the blue door, open the north-west corner and follow the corridor to a lift leading to a rocket launcher, a megaarmor, rockets, and a medikit (the megaarmor and rockets will not be there on Ultra-Violence and Nightmare skill levels). (sector 4)
  5. At the supplies mentioned in the previous secret, go north through the nukage and north-east until you reach a demon guarding a box of rockets, a supercharge and a radiation shielding suit. (sector 84)


A multiplayer-only rocket launcher (Thing 44) has no flags set for any of the three difficulty classes, so it does not actually appear in the level.

Demo files[edit]

Areas / screenshots[edit]


Routes and tricks[edit]

Current records[edit]

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

Run Time Player Date File Notes
UV speed 1:38.77 Guanlan Chen (GarrettChan) 2021-09-04 l1e4-138.zip
NM speed
UV max
NM 100S
UV -fast
UV -respawn
UV Tyson
UV pacifist

The data was last verified in its entirety on December 7, 2021.


Player spawns[edit]

This level contains four spawn points:

  1. facing south-west. (thing 2)
  2. facing east. (thing 5)
  3. facing north-east. (thing 39)
  4. facing north-west. (thing 40)


Map data[edit]

Things 223
Vertices 868*
Linedefs 978
Sidedefs 1290
Sectors 176
* The vertex count without the effect of node building is 774.


This level contains the following numbers of things per skill level:

Technical information[edit]

Inspiration and development[edit]


See also[edit]


External links[edit]