E5M9: The Marshes (Doom: The Lost Episode)

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Doom: The Lost Episode maps
This level occupies the map slot E5M9. For other maps which occupy this slot, see Category:E5M9.

E5M9: The Marshes is the ninth and secret map of Doom: The Lost Episode, accessible from E5M5: The Mansion. It was designed by Xaser and uses the music track "Message for the Archvile" by Robert Prince. The par time defined in MAPINFO is 30 seconds.


Map of The Marshes
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 start facing a skull switch, with the exit door on your left. Press the switch to lower the wall in front of you, and lower a floor behind you revealing one of two cyberdemons in this level - when you start firing your weapons a second cyberdemon will teleport into the level, and both must be killed to open the exit door. Once both cyberdemons are dead, return to the starting area and go through the exit door then turn right to find a skull switch that will finish the level and send you to E5M6: Twilight Descends.

Other points of interest[edit]

In the south part of the level, there are numerous trees forming a forest of sorts. If you carefully search within it you can find a light amplification visor, a backpack and a super shotgun.

There is a wooden building in the east area of the level. If you walk up the stairs you will see two skull switches on either side; the right-hand switch increases the light level across most of the outdoor area, while the left-hand switch reduces the light level. The building also contains a chaingun and boxes of bullets at the top of the stairs, and a plasma gun in the small building to the south-west.

In the water/blood pool at the center of the level are three groups of four teleporters. Never step on the ones in the south, as they lead to an inescapable room; pressing the switch here will activate a crushing ceiling.


  1. Use the west teleporter in the water to get to the top of the left building in the water, then jump south to the walkway on the building south-east of it. Enter to get a computer area map in an alcove. (sector 33) A megasphere can also be found nearby.
  2. Press the switch in secret #1 and attempt to drop down to teleport to a tunnel where you can get a BFG9000. (sector 6) Collecting the item will change the water outside to blood.


The player 5 through 8 starts (Things 57-60) have no flags set for any of the three difficulty classes, but because of special handling in the engine, they function normally in the level.

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
NM speed
UV max
NM 100S
UV -fast
UV -respawn
UV Tyson
UV pacifist

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


Player spawns[edit]

This level contains six spawn points:

  1. facing south. (thing 134)
  2. facing south. (thing 135)
  3. facing east. (thing 136)
  4. facing east. (thing 137)
  5. facing east. (thing 138)
  6. facing east. (thing 139)


Map data[edit]

Things 157
Vertices 437*
Linedefs 418
Sidedefs 576
Sectors 50
* The vertex count without the effect of node building is 360.


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

Technical information[edit]

Inspiration and development[edit]

This level is based on MAP57: The Marshes from the Sony PlayStation version of Doom and has a largely identical layout.


See also[edit]


External links[edit]