MAP04: Dirty Water (BTSX-E2)


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Secret map: 31

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

MAP04: Dirty Water is the fourth map of the second episode of Back to Saturn X. It was designed by Mike Alfredson (Use3D) and Richard Frei (Tarnsman), and uses the music track "Lost City," by Sarah Mancuso (esselfortium).

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Map of Dirty Water
Letters in italics refer to marked spots on the map. Sector numbers in boldface are secrets which count toward the end-of-level tally.


Other points of interest[edit]


  1. In the northwest of the map near the start is a small shrine-like building with a short altar in the center, with a few revenants and a mancubus within. From the center altar facing to the east, shoot the wall with the candles behind it. That wall will raise, along with a wall to its north, revealing a chaingun and some ammo. (sector 52)
  2. In the very southwest of the map, ride the lift into the building with a blue switch inside. Immediately after the lift, turn to the north (your right) and activate the wall. The wall will descend and reveal a teleporter, leading to a small room in the far east with a soulsphere. (sector 1001)


Demo files[edit]

Areas / screenshots[edit]


Routes and tricks[edit]

Current records[edit]

The records for the map at the Doomed Speed Demos Archive are:

Run Time Player Date File Notes
UV speed
NM speed
UV max
UV -fast
UV -respawn
UV Tyson
UV pacifist

Miscellaneous demos[edit]

Style Time Player Date File Notes

This information was last verified in its entirety on January 20, 2018.


Map data[edit]

Things 1012
Vertices 5597*
Linedefs 6485
Sidedefs 8953
Sectors 1087
* The vertex count without the effect of node building is 5166.


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

Technical information[edit]

Inspiration and development[edit]


See also[edit]


External links[edit]