MAP21: One Flew Over The Caco's Nest (Alien Vendetta)


Alien Vendetta maps 21-30

01 02 03 04 05 06 07 08 09 10
11 12 13 14 15 16 17 18 19 20
(21 - 30)
Secret maps: 31 32
Black Label: 01 02

This level occupies the map slot MAP21. For other maps which occupy this slot, see Category:MAP21.

MAP21: One Flew Over The Caco's Nest (called One Flew Over the Cacos Nest [sic] on the intermission screen) is the twenty-first map of Alien Vendetta. It was designed by Pablo Dictter and uses the music track "Grove" from Hexen. It was one of the few maps to remain unchanged from the first release to the second. The par time defined in the executable is 4:40.

The title of this level is a pun on the title of the novel One Flew Over the Cuckoo's Nest by Ken Kesey (made into a Broadway play in 1963 and a film in 1975), and the name of the Cacodemon.


Map of One Flew Over The Caco's Nest
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.


In the first part, if you stand under the descending bars (sector 347), they will not go down anymore.

Grab the chaingun here, looking out for the cacodemons which arise from the blood pool. Follow the next hall until you find a super shotgun. The nearby switch will lower it. Keep on going down the linear path. When you find a fork, go left, as right requires the red key. To open the big faceted wall, hit the nearby switch to lower it. In the next room with the pain elemental, hit the switch sitting there to open both of the doors. Make your way to the bend of the hallway. Turn around and hit the switch to lower the nearby bars to the red skull key. Now backtrack to the red door and go through it, following the path all the way to a red symbol on the wall and a teleporter pad with candle on it. From here it is just a very linear path to the exit.



  1. Near a red inverted cross in the wall near the beginning of the level, there is a flashing wall covered by green vines. Open it to get a plasma rifle. (sector 139)
  2. Directly across from the exit teleporter is a skull recessed in the wooden wall. Press the use key on it to open a nearby secret area with a soul sphere. (sector 579)


  1. Facing the switch which lowers the bars to the red key room, turn to the north and open the electronic panel at the end of the corridor to get a soul sphere.


These multiplayer-only Things: super shotguns (things 354 and 358), shotgun (thing 388), plasma gun (389), health bonus (384), armor bonuses (385, 386 and 387); have no flags set for any of the three difficulty classes, so they do not actually appear in the level.

Areas / screenshots[edit]


Routes and tricks[edit]

Current Compet-n records[edit]

The Compet-n records for the map are:

Run Time Player Date File Notes
UV speed 01:48 Tatsuya Ito (Tatsurd-cacocaco) 2010-03-05
NM speed 04:35 Tatsuya Ito (Tatsurd-cacocaco) 2010-03-06
UV max 03:52 Tatsuya Ito (Tatsurd-cacocaco) 2010-12-19
NM100S 04:35 Tatsuya Ito (Tatsurd-cacocaco) 2010-03-06
UV -fast 07:46 Chris Ratcliff (Ryback) 2003-02-05
UV -respawn
UV Tyson 11:22 Jim Leonard (Xit Vono) 2002-04-04
UV pacifist

The data was last verified in its entirety on July 6, 2020.

Current DSDA records[edit]

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

Run Time Player Date File Notes
UV speed 1:48.46 Tatsuya Ito (Tatsurd-cacocaco) 2010-03-05
NM speed
UV max 3:47.80 Andrea Rovenski (Cyberdemon531) 2023-08-31
NM 100S 4:35.71 Tatsuya Ito (Tatsurd-cacocaco) 2010-03-06
UV -fast 5:03.74 Andrea Rovenski (Cyberdemon531) 2023-09-01
UV -respawn
UV Tyson 7:56.74 Andrea Rovenski (Cyberdemon531) 2023-09-01
UV pacifist
NoMo 0:30.69 Doomdaniel95 2013-04-05
NoMo 100S 0:43.34 Unknown 2002-01-04

The data was last verified in its entirety on November 2, 2023.


Player spawns[edit]

This level contains five spawn points:

  1. facing north. (thing 352)
  2. facing south. (thing 353)
  3. facing south. (thing 355)
  4. facing south. (thing 357)
  5. facing east. (thing 383)


Map data[edit]

Things 407
Vertices 4525*
Linedefs 4366
Sidedefs 6578
Sectors 621
* The vertex count without the effect of node building is 3915.


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

External links[edit]