MAP05: Total Exposure (BTSX-E1)


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Secret maps: 31 32

This level occupies the map slot MAP05. For other maps which occupy this slot, see Category:MAP05.

MAP05: Total Exposure is the fifth level of the first episode of Back to Saturn X. It was designed by Walker Wright (Pavera), and uses the music track "Atmospheric Pressure" by James Paddock. The par time is 3:30. In the official add-on version, this level's name is No Enclosure.


Map of Total Exposure
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.


Collect the shotgun in front of you then head straight forward to an armor guarded by several zombiemen. Head east through the hallways on either side until you get to some stairs, climb them to enter a chamber with zombies and imps then head south up another set of steps and dispose of some more imps waiting on a ledge. Press the button in the east wall to open the wall next to it and get outside to a bridge, where you will encounter cacodemons, imps and teleporting demons (plus an arachnotron on Hurt Me Plenty (HMP) skill level or higher), then open the door at the other end of the bridge to confront two revenants guarding a switch. Flip the switch to open a door behind you and reveal a Hell knight, then go through and pass through a second door on your right to enter a water trench. Turn right and right again to find another switch overlooked by arachnotrons, which will lower a pillar behind you holding the red keycard but will also release one or more revenants into the previous room.

Go back to the bridge and head north up a couple of steps to find a rocket launcher, then open the red key door on the east side and follow the path east, south and west around the red key area to enter a room with zombies. Head south into a corridor with a revenant, then continue west until you get back outside and find yourself on a curved bridge; use caution here as one or two arachnotrons will teleport in when you try to cross. Head through the doorway at the north end of the bridge, then pass through a door on your left and go down some steps before running across the gap in front of you. Turn left to see one or two revenants guarding a lift, kill them then press the button on the lift to go down to a corridor with one or two knights. Head forward to find yourself on a walkway overlooking the starting room - as you enter, the floor of that room will rise and a cyberdemon will teleport in, and you will have to contend with revenants (plus an arch-vile that teleports in on Ultra-Violence (UV) and Nightmare (NM)) that are released ahead.

Head to the west side of the room and go down some steps (another arch-vile is waiting here on UV and NM), then cross a bridge overlooked by imps to enter a hallway with a pair of exit signs. Head west through a corridor guarded by zombies then climb some steps to find the blue keycard on a balcony (guarded by three revenants on HMP or higher). Head back to the starting area and go to the "LOCK" panel in the south-east corner, which you can activate using the blue key to open a compartment on your right containing, depending on skill level, an arch-vile or one or two mancubi. Press the button inside the compartment then go back to the exit signs you saw earlier - steps have lowered, allowing you to head straight forward and press the exit button that is revealed ahead.

Other points of interest[edit]


  1. Once through the red key door, follow the pathway until you come to the point shown in the screenshot below. Turn right at this point and follow the pathway down to find a box of bullets, two boxes of rockets and a plasma gun (the last item is replaced with a berserk pack on HMP or higher). (sector 16)


If the shells in the starting room are left uncollected, they will float up and become impossible to obtain once the cyberdemon trap is sprung.

Areas / screenshots[edit]


Current records[edit]

The records for the map at the Doom Speed Demo Archive are:

Run Time Player Date File Notes
UV speed 1:18.83 HeadshotTAS 2019-11-16
NM speed
UV max 5:12.57 rd 2020-02-22
NM 100S
UV -fast
UV -respawn
UV Tyson
UV pacifist
NoMo 1:09.37 Sayeth 2021-02-18

The data was last verified in its entirety on June 3, 2022.


Map data[edit]

Things 530
Vertices 3231*
Linedefs 3418
Sidedefs 4968
Sectors 408
* The vertex count without the effect of node building is 2833.


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

Technical information[edit]

Inspiration and development[edit]


External links[edit]