MAP20: Ganymede Outpost (10 Sectors)


10 Sectors maps 11-20

01 02 03 04 05 06 07 08 09 10
(11 - 20)
21 22 23 24 25 26 27 28 29 30
Secret maps: 31 32

This level occupies the map slot MAP20. For other maps which occupy this slot, see Category:MAP20.

MAP20: Ganymede Outpost is the twentieth map of 10 Sectors. It was designed by Tarin.


Map of Ganymede Outpost
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.


There are a number of paths you can take at the beginning. To progress with the map, go with the path going east, going northeast as much as you can through an outdoor section to the northeast corner of the map. In this room, head west through another outdoor section. Once you head back inside, you should be in the northwest part of the map, where a red switch and a blue key reside. Take the key and backtrack, going to the far southeastern reaches of the map. A chaingun is here if you did not take it before. Open the blue door and keep going until you see a switch. This will lower the blue bars in the map. Look out for imps and Hell knights as you make your way back to the big outdoor section.

The blue bars blocking access to the yellow key should now be gone, so take the key, which is close to the northwestern corner of the map. Backtrack again, this time to the starting point, and take the paths to the west. From there, go north, all the way until you find a yellow switch. Press it to open the nearby yellow bars, then make your way over there (from the starting point, take the northeast path, and continue north). The red key is just behind these bars. Unfortunately, you will have to backtrack the long way to the red switch which you remember seeing when you got the blue key. After you reach it, hit the switch and head south looking out for teleporting monsters as you go. The exit is in the western part of the map, so fight your way to it.


  1. At the start, take the northwest path and keep going until you are in a room with some zombiemen and a mancubus (plus a demon or two on higher skill settings). In this room, the western wall with pipes on it can be opened for ammo clips, shotgun shells, and stimpacks. (sector 9)

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
NM speed
UV max 6:33.11 vdgg 2010-08-20
NM 100S
UV -fast
UV -respawn
UV Tyson
UV pacifist
NoMo 1:53.14 Doug Merrill (Opulent) 2000-11-22

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


Player spawns[edit]

This level contains eight spawn points:

  1. facing north. (thing 225)
  2. facing north. (thing 226)
  3. facing south-west. (thing 227)
  4. facing west. (thing 228)
  5. facing south-east. (thing 229)
  6. facing east. (thing 230)
  7. facing north-west. (thing 231)
  8. facing north. (thing 232)


Map data[edit]

Things 323
Vertices 3360*
Linedefs 3085
Sidedefs 4782
Sectors 10
* The vertex count without the effect of node building is 2842.


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

External links[edit]