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). In the official add-on version, this level's name is Sunken Sanctuary.

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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. Near the start is a small, shrine-like building with a short altar with a heart in the center, with two revenants and a mancubus within. From the center altar facing to the east, hit the pillar with the spine-like texture and candles behind it. That wall will raise, along with a wall to its north, revealing a chaingun, two boxes of bullets and three stimpacks. (sector 52)
  2. At the very southwest of the map, ride the lift into the building with a blue switch inside. When you approach the blue switch, a monster closet containing two revenants will open. The back wall of this closet is made of one large slab rather than several smaller ones; opening it will 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 1042
Vertices 5617*
Linedefs 6494
Sidedefs 8975
Sectors 1086
* The vertex count without the effect of node building is 5172.


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

Technical information[edit]

Inspiration and development[edit]


See also[edit]


External links[edit]