E2M1: Biosphere (Doom the Way id Did: The Lost Episodes)

From DoomWiki.org

DtWiD: The Lost Episodes maps
Knee-Deep in the Dead

M1 M2 M3 M4 M5 M6 M7 M8 M9

The Shores of Hell

M1 M2 M3 M4 M5 M6 M7 M8 M9

Thy Flesh Consumed

M1 M2 M3 M4 M5 M6 M7 M8 M9

Base Instinct

M1 M2 M3 M4 M5 M6 M7 M8 M9 M0

The Final Gate

M1 M2 M3 M4 M5 M6 M7 M8 M9

This level occupies the map slot E2M1. For other maps which occupy this slot, see Category:E2M1.

E2M1: Biosphere is the first map of episode The Shores of Hell in Doom the Way id Did: The Lost Episodes. It was designed by Lorenzo Davia (Ultimate Lorenzo).


Map of Biosphere
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 continue north, going down some curved steps to face a pair of shotgun guys. In the next room, kill some zombies and imps then head round the outer ledge to get a radiation shielding suit, then drop down the central hole and walk south into a nukage pool. Follow the nukage east and south to enter a room with two spectres, then collect the blue skull key between the two trees by the north wall. Go back to the pit area and head south up some steps to a vine-filled room, kill some shotgun guys then continue east up a second set of steps to get back to the starting area.

Return to the pit room and open the blue door in the north-east corner to get outside, then head south-east through the courtyard to find a vine-covered walkway leading to a small door. Go through the door then head south and east past a couple of imps and zombies to reach a curved staircase, then climb up it to find the red keycard - the key is blocked by a demon (or cacodemon on Hurt Me Plenty skill level or higher), and a closet containing more monsters will open behind you. Go back down the steps and head west to a red door, open it then go straight forward over another walkway to some steps. Go down the steps and look left to kill three demons, then head to the south end of the room - the wall ahead will lower to reveal one or two more demons guarding the exit door, and one to three imps will be released behind you. Go through the exit door and walk straight forward to the exit button.

Other points of interest[edit]


  1. In the south-west area with three trees, press on the northern-most tree, which is flickering, to open an alcove nearby with a plasma gun and an energy cell. (sector 63)
  2. From secret #1, head north-west and go down the steps to the nukage pool. Open the west wall at the bottom of the steps to get a berserk pack. (sector 69)
  3. At the east side, open the red door and go until you hear a door open. Backtrack to the previous room and head north through the open passage. At the end you can find a chaingun, an energy cell and a medikit. (sector 122)


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 00:50 Andrea Rovenski (Cyberdemon531) 2014-04-08 l2e1-050.zip
NM speed
UV max
NM 100S
UV -fast
UV -respawn
UV Tyson
UV pacifist

The data was last verified in its entirety on December 7, 2021.


Player spawns[edit]

This level contains four spawn points:

  1. facing north. (thing 97)
  2. facing north-west. (thing 98)
  3. facing north-east. (thing 99)
  4. facing north-east. (thing 100)


Map data[edit]

Things 184
Vertices 641*
Linedefs 716
Sidedefs 977
Sectors 134
* The vertex count without the effect of node building is 582.


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

Technical information[edit]

Inspiration and development[edit]


See also[edit]


External links[edit]