From DoomWiki.org

The starting areaThe starting area
Author Bob Carter
Port Vanilla Doom
Year 1994
Link Doomworld/idgames
This level occupies the map slot E2M1. For other maps which occupy this slot, see Category:E2M1.
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B21 is a single-level PWAD for Doom that was released in 1994. It was designed by Bob Carter. It was later adapted as E3M6 of The Lost Episodes of Doom.


Map of B21
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.


Other points of interest[edit]


  1. In the area after the start is a round platform containing a soul sphere. This can be obtained by running onto it, or by pressing any of its walls on the north side. (sector 16)
  2. The south-east of the trench near #1 is narrower than the rest – walking over this part will open up a door behind the start, leading to a room with a chaingun. It will also open up the northern part of the trench. (sector 3)
  3. The north-west contains a room with various floors going up and down. There is a room to the east of this with a switch, which opens a room to the east of the southern oscillating floors, containing a blue key, a spectre, an energy cell pack, a medikit, a rocket launcher, and a rocket. (sector 72)
  4. The switch that opens up #3 also opens a room off the middle-right of the fifteen northern oscillating floors, which contains a switch opening up an area north of the easternmost of the three crushing ceilings. This leads to a BFG9000, a partial invisibility, a health bonus, and some ammo. (sector 227)


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
NM speed
UV max
NM 100S
UV -fast
UV -respawn
UV Tyson
UV pacifist

The (absence of) data was last verified in its entirety on November 30, 2021.


Player spawns[edit]

This level contains five spawn points:

  1. facing east. (thing 230)
  2. facing east. (thing 231)
  3. facing east. (thing 232)
  4. facing east. (thing 233)
  5. facing west. (thing 375)


Map data[edit]

Things 446
Vertices 1439*
Linedefs 1456
Sidedefs 2073
Sectors 276
* The vertex count without the effect of node building is 1186.


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

Technical information[edit]

Inspiration and development[edit]


See also[edit]


External links[edit]