E1M3: Laboratory (Chex Quest)

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Chex Quest maps
This level occupies the map slot E1M3. For other maps which occupy this slot, see Category:E1M3.

E1M3: Laboratory (known as "Experimental Lab" on the automap) is the third map of Chex Quest. It was designed by Digital Café and uses the music track "Laboratory" by Andrew Benon.


Map of Laboratory
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.


Go to the right, open the door, turn left, open another door, go behind it, open another door, go behind it, head down the corridor, open another door, take blue key in corner. Backtrack, open blue door, go behind pillar, open another blue door and another regular door behind it, step onto the teleporter pad. Open door, go down the tunnel behind it and past the chemistry desk, open door, take a U turn behind it, open door, go down tunnel, open yet another door, go behind the desk, open door, turn left, open door, take yellow key. Backtrack, open yellow door, go down the hallways, open door, open another door behind it, go down the hallway, open door, turn left, open door, go down some more halls, open door, turn left, go past the white desks, take red key. Backtrack, open red door, go by the tunnel, open door and another one behind it, trip down the black and white stripped tunnel, flip the switch and flip another one behind it.

Other points of interest[edit]

  1. The non-secret computer area map is on a damaging pedestal.
  2. The trap in the red key room has a chex armor, simply go through the slimed wall the flemoids came from.


  1. The bookshelves at the very first chemistry room need to be pressed to open up a secret with a computer area map. (sector 125)
  2. The vents in the first gray non-secret area are passable through, simply go through the vent opening and crawl into a transport area, jump into the teleporter pad to get launched back into the very first chemistry room. (sector 231)
  3. The vents on the central pillar in the key-locked door hub area have the same effect as the second secret, go through the vent opening to get a chex armor. (sector 149)
  4. The room after the full potion room needs to get its right glass cupboard pressed to open up and reveal a zorch propulsor and a zorchpak. (sector 203)


  1. Some walls are shootable through.
  2. There's a common flemoid outside the map.
  3. There's a flemoidus cycloptis stuck in the exit room.
  4. There are two computer area maps in the map, thus making it impossible to get 100% items, since the player can only pick up one map per level. However, some source ports allow picking up both computer area maps.

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 1:45.51 Plerb 2023-07-05 cq1_e1m3_1_45_51.zip
NM speed
UV max 2:09.66 Bainshie-Doom 2022-09-23 cq3m209.zip
NM 100S
UV -fast 3:14.51 grapes 2023-06-21 cq03f314.zip
UV -respawn 2:53.60 grapes 2023-07-10 cq03r253.zip
UV Tyson 3:34.46 Andrea Rovenski (Cyberdemon531) 2023-06-03 chex1-3t334.zip
UV pacifist
NoMo 1:21.17 Aleksey Kamenev (4shockblast) 2019-08-24 c1q3o121.zip

The data was last verified in its entirety on July 24, 2023.


Player spawns[edit]

This level contains only three spawn points, making it unplayable in deathmatch mode:

  1. facing north. (thing 223)
  2. facing south. (thing 231)
  3. facing south. (thing 232)


Map data[edit]

Things 233
Vertices 1040*
Linedefs 1071
Sidedefs 1513
Sectors 233
* The vertex count without the effect of node building is 894.


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

Technical information[edit]

There is no secret exit.

Inspiration and development[edit]


See also[edit]

External links[edit]