MAP31: Optical Hopscotch (BTSX-E1)


Back to Saturn X E1 maps 24-25 & 31-32

01 02 03 04 05 06 07 08
09 10 11 12 13 14 15 16
17 18 19 20 21 22 23
(24 - 25, 31 - 32)

This level occupies the map slot MAP31. For other maps which occupy this slot, see Category:MAP31.

MAP31: Optical Hopscotch is the secret level of the first episode of Back to Saturn X. It was designed by Paul DeBruyne (skillsaw), and uses the music track "Bitmap" by Sarah Mancuso. It is accessed from MAP15. The par time defined in MAPINFO is 4:45. In the official add-on version, this level's name is Defenestrator.

Under construction icon-yellow.svgThis article about a map is a stub. Please help the Doom Wiki by adding to it.


Map of Optical Hopscotch
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. Use the wall south of the red key to reveal a lift leading up to a soul sphere and a stimpack. (sector 289)
  2. At the southeastern part of the level are some rising and lowering square lifts, which will eventually take you to the blue key. On the ledge where the first lift lowers, ride it up, and head to the third lift. From there, make sure the lift reaches the top, then run into the nukage fall. From then on, you can reach the secret exit, but only if you had obtained the red and yellow keys first. (sector 389)
  3. In the nukage just south of the large room with teleporting enemies leading to the red key, enter the northwestern nukage fall to find a secret area. To reach the megasphere here, you will have to carefully jump on lowering platforms until you reach the lift. (sector 449)
  4. North of the bridge past the three-key doors, near the nukage are some rocks with stimpacks leading to an armor. If you run towards the nukage fall from the armor you will wind up in a cave with a radiation suit and numerous health and armor bonuses. (sector 643)
  5. To get the computer area map near the red key, there is a shootable switch in its sector, which opens the door to it. (sector 761)


Demo files[edit]

Areas / screenshots[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 877
Vertices 5145*
Linedefs 5685
Sidedefs 7807
Sectors 775
* The vertex count without the effect of node building is 4715.


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

Technical information[edit]

Inspiration and development[edit]


See also[edit]


External links[edit]