MAP04: Nucleus (Eternal Doom)


Eternal Doom maps 01-11

(01 - 11)
12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
Secret maps: 31 32
Bonus maps: 33 34

This level occupies the map slot MAP04. For other maps which occupy this slot, see Category:MAP04.

MAP04: Nucleus is the fourth level of Eternal Doom and was designed by Sverre Kvernmo. You have entered the loading zone and it is filled with crates. Once you find the red key you descend back underground into a sewage treatment area.


Map of Nucleus
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 can get the backpack and the chainsaw on this level.

In the northwestern loading bay, you'll see a flashing light. Shoot the wall behind it and press the switch. Then go left (to a medkit) which will lower several crates and allow you to progress into other parts of the level. The red key is obvious in loading bay 3; just climb the crates. To get the blue key, pass through the brown effluent downpour in a room off the underground tunnel (looks like a solid column but don't be fooled) and continue from there. For the yellow key, you must wait for the door into the narrow passage that leads to the key to close behind you, then flip the switch on that door. (Flipping the switch in front of you will just open the door you entered through again; the switch on each door opens the opposite door.) The exit is a teleport pad in the central, underground rotunda surrounded by green killer slime. To get to it, throw the switch on the rotunda wall opposite the entrance. You will like to have full life points for this.

There are at least four radiation suits that you can use in the green slime rotunda: One is behind the pillar down in the back. Three are in a room that you can reach by going into the tunnel to the west, taking the lift into a white tiled room, and proceeding to the next two rooms. In the last room, the switch on the island will open three radiation suit compartments. Although it is a long way back to the rotunda, you should be able to reach it with 30 seconds left before the suit wears out.


  1. In cargo bay 1, you will unlock a control panel. Pushing the button opens a door on the left hand side of the panel, you can see it on the map. Enter and use the lift to go up, and then go through the narrow passage to the next lift. Open the next wall, which has caution stripes, then use the lift. Make sure to ride it up, at the top you can get a chainsaw if you drop onto a crate. Aside from that, open a wall with the electricity symbol on it to find a chute, where you can drop down, then run and grab the soul sphere. (sector 248)
  2. In the sewer tunnels, after waiting approximately thirty seconds in the southernmost room, continue eastward. When you see the energy cell, head through the broken piece of wall to find an imp and two boxes of rockets. (sector 824)
  3. In the slime tunnels at the northwestern part of the map, make your way up, then drop to the northwestern corner. Open the wall next to the burning barrel to find a berserk pack. (sector 240)
  4. When you find the yellow skull key, next to the room leading to it are two small control rooms at opposite sides. One has what looks like two blue doors (actually just decoration) and a switch in it. Push it and in the other one, the wall next to the control panel sinks down. Run quickly over there and drop down before it rises, appearing in a part of the crate-filled region, where you can get a soul sphere, a medikit, and a box of rockets. (sector 634)

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 1:27.71 GrumpyCat 2020-11-19
NM speed
UV max 13:12.51 j4rio 2013-05-31
NM 100S 8:17.34 j4rio 2014-07-24
UV -fast
UV -respawn
UV Tyson 1:02:25.51 j4rio 2018-06-04
UV pacifist
NoMo 100S 6:08.86 Kai-Uwe Humpert (Gazelle) 1997-09-18

The data was last verified in its entirety on December 21, 2021.


Player spawns[edit]

This level contains four spawn points:

  1. facing east. (thing 1)
  2. facing east. (thing 7)
  3. facing east. (thing 8)
  4. facing north. (thing 9)


Map data[edit]

Things 421
Vertices 4628*
Linedefs 4861
Sidedefs 6923
Sectors 830
* The vertex count without the effect of node building is 3891.


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

External links[edit]