MAP05: Skybase (Biowar)


Operation: Biowar maps 01-11

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

MAP05: Skybase is the fifth map of Biowar. It was designed by Chris Harbin and uses the music track "Dredge" by Mark Klem.


Map of Skybase
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.


Press the switch and you'll find yourself in a warehouse with lots of zombiemen wandering around. Take a left turn right away to find an alcove containing a shotgun and a backpack that will allow you to mow down the enemies here with ease. You can search for more supplies in this warehouse, including a security armor that's useful for better protection against shotgunners and imps, until the path ahead takes you to an elevator. Go up, then go left, stopping to kill the heavy weapon dude guarding a super shotgun, netting you two new weapons, then resume walking down the corridor. Past the door, behind the grates you can see a large darkened area containing the yellow keycard, although it is not yet obtainable. Instead, flip the switch next to the key, go back up the stairs and enter the new door that has just opened to the right. Dispatch the chaingunners and past another door you'll find yourself in the reactor room, which contains many perched imps and shotgunners that'll try to wear you down. You can kill them with the weapons you have or save them for later and go down the elevator.

In this underground area, kill the demons blocking your path and watch out for the teleporter device ahead as it will bring in shotgunners and chaingunners. Behind this device is the red keycard, and after picking it up, you need to backtrack to where you originally obtained the super shotgun, and take the other path available there. Kill the shotgunners, then enter the room to your right, which has several imps and the red switch which will unlock a door at the end of the corridor. Flip the lever in the central structure to cause the platform to lower revealing a rocket launcher, but also a baron of Hell(or Hell knight on lower difficulties) guarding it to engage you. This lever also lowers the yellow key in the darkened room you cleared previously, so make your way there, then return to the room where you fought the baron as that is where the yellow door is located.

Entering the room causes a lot of small alcoves containing several hitscanners to open, so dispatch them quickly with the rocket launcher before they can deal too much damage. Then, go down the stairs, head left, and head down another elevator to find a small room with a switch, after which you can head back up and face off against a cacodemon and other monsters on a path opened to your right. Press another switch here to open the door on the opposite end of this corridor, revealing another elevator that takes you for a long trip underground. Here you will find yourself in a snowy cavern, and after finding a switch behind the machinery in front of you, you can enter a short waterway where one more switch needs to be pressed. This will unlock a teleporter in the snowy cavern taking you back up in the corridor with the cacodemon: backtrack from before you entered this corridor and the room on the opposite end will be open now. In this section you can finally obtain the blue keycard, located on a metal pedestal that can be lowered by a switch on its base.

The blue door is located all the way back to the first underground section that you visited, past the reactor room. Past its short corridor is a teleporter that will take you on the balcony the hitscanners were firing at you from in the reactor room itself. Past a small corridor here, you can access an elevator to exit the level.

Other points of interest[edit]


  1. Enter the rocket launcher room and lower the rocket launcher, then return to the yellow key room and it should be accessible. There is another switch in this room at the northeast end. Use it to lower the south wall. Behind it you can find a box of ammo, a box of shotgun shells, a green armor, and a berserk pack. (sector 48)
  2. In the dark green hallway at the southeast end of the map, there is a bit of light somewhere near the east wall. This is a hidden door; open it to find a backpack, a box of shotgun shells, and partial invisibility. (sector 234)
  3. Use the switch near the yellow key platform to open up the door south of this area. In the next room, use the terminal to the west to find a stimpack, a chaingunner, and two boxes of rockets. (sector 265)


Demo files[edit]

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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 4:33.17 Elmle 2020-03-07
NM 100S
UV -fast
UV -respawn
UV Tyson
UV pacifist
NoMo 100S 2:46.49 Revved 2022-07-04

The data was last verified in its entirety on August 1, 2022.


Player spawns[edit]

This level contains four spawn points:

  1. facing south. (thing 250)
  2. facing west. (thing 251)
  3. facing south-east. (thing 252)
  4. facing west. (thing 253)


Map data[edit]

Things 302
Vertices 1920*
Linedefs 1827
Sidedefs 2478
Sectors 274
* The vertex count without the effect of node building is 1580.


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

Technical information[edit]

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