MAP31: Castor (Mass Extinction)


Mass Extinction secret maps
Episode 1: Devonian

01 02 03 04 05 06 07

Episode 2: Carboniferous

08 09 10 11 12 13 14

Episode 3: Permian

15 16 17 18 19 20 21 22 23

Episode 4: Triassic

24 25 26 27 28 29 30

Secret levels
This level occupies the map slot MAP31. For other maps which occupy this slot, see Category:MAP31.
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MAP31: Castor is the first secret map of Mass Extinction. It was designed by Nicolás Monti and uses the music track "". The par time defined in MAPINFO is 1:15.


Map of Castor
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.


Other points of interest[edit]


  1. At the normal exit area, jump northeast to the waterfall. If you do it right, you will be behind it, where you can find a switch that allows you to access the secret exit to the northwest. (sector 190)


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 (normal exit)
UV speed (secret exit)
NM speed (normal exit)
NM speed (secret exit)
UV max
NM 100S
UV -fast
UV -respawn
UV Tyson
UV pacifist (normal exit)
UV pacifist (secret exit)

The (absence of) data was last verified in its entirety on February 21, 2022.


Player spawns[edit]

This level contains eight spawn points:

  1. facing south. (thing 340)
  2. facing north. (thing 341)
  3. facing west. (thing 342)
  4. facing east. (thing 343)
  5. facing south. (thing 344)
  6. facing south-east. (thing 345)
  7. facing south. (thing 346)
  8. facing west. (thing 347)


Map data[edit]

Things 374
Vertices 2403*
Linedefs 2198
Sidedefs 2873
Sectors 244
* The vertex count without the effect of node building is 1922.


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

Technical information[edit]

Inspiration and development[edit]


See also[edit]


External links[edit]