MAP13: Asylum (Icarus: Alien Vanguard)


Icarus maps 12-20

01 02 03 04 05 06 07 08 09 10 11
(12 - 20)
21 22 23 24 25 26 27 28 29 30
Secret maps: 31 32

This level occupies the map slot MAP13. For other maps which occupy this slot, see Category:MAP13.

MAP13: Asylum is the thirteenth level of Icarus: Alien Vanguard, set in a simulation consisting largely of similar-looking grey-paneled rooms. It was designed by Robert Taylor.


Map of Asylum
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.


From your starting point, you will see the red skull key on a ledge, and, like all the levels in this megawad, it is the key for the exit. Grab the super shotgun and turn left. Go all the way down the green hallway until you reach the wall with blue triangles. Open this wall and take the left (east) corridor until you see a window to the right. Press on the wall opposite of the window to open it. In this area, just head north all the way until you spot a wall in the northwest corner with a symbol on it. Press this wall to open the way to an examination room with a chainsaw in the middle and demons on the back wall. Head right from this room and open the next wall with a symbol on it to find a staircase. At the end of this staircase you will get the red skull key. You can then jump back to the starting room and then go back down the corridor and open the wall again. This time, go west into an open room. Open the southwestern wall and then open the nearby wall with the insignia on it. Then open the wall to the left in there. At the fork, go right, and near the cage, you will see a wall with red markings around it. Head through this wall and teleport to the exit room.

Other points of interest[edit]

Turn left from the start and head into the gray area. There is an army of imps (plus one shotgun guy) in here. If you go to where they were positioned, you will trigger a lift to the north. Inside, are some Hell knights, barons of Hell, and a megasphere. If you press on the eastern wall that has the symbol on it, you will open it to reveal the inside of a cage with an energy cell pack and a plasma gun.

Grab the supercharge in the area with the cages to the northeast (it is on the way to the red key). There is a linedef slightly west of it which opens several blocks. Trigger it then head due south of where the soul sphere is, through the cage to the right of the path that has boxes of shells. Approach the end of this cage and the wall will open revealing a megaarmor.

When you get close to the red key, a door will open. Backtrack a bit to find the northern wall has opened up. Inside are an arachnotron and some demons. Grabbing the armor in the back triggers walls to open with Hell knights inside.

The southwest part of the map has a rocket launcher in the center. There are imps in the hallway surrounding this area. Find a way to the interior of this area and to get the rocket launcher, press any of the walls to open the room with the gun. Be careful of the arch-vile and mancubi, and watch out because when you pick up the weapon as all of the walls will lower.

In the southeast part of the map, you will encounter some demons and a toxic floor that represents the insignia that you have seen throughout the map. Go through the wall it is pointing at to pick up the blue skull key. Note that entering this room will cause the blue section of the insignia to rise to the ceiling, while walking past the northeast end of the insignia will cause the wall to drop again.

In the open area that holds the backpack, press on the wall with the blue triangles behind the backpack to find a prison-like area. There are several monsters in the three cages, including zombiemen, demons, and a baron of Hell. If you approach the middle cell from the step, you can crush the demons in the middle cell. To reach the pickups in the other cells, you must run from the windowsill to the first cell. You'll notice that one cell bars segment has a misaligned texture and you can go through it. Once inside, you may collect a box of shells and a supercharge. Approach the silver barrier and it will sink into the floor—along with the barrier blocking the eastern cell. Inside that cell, you can pick up 16 armor bonuses, a stimpack and a box of shells.



  1. In the room where you find the blue key is a small table carrying a berserk. Standing in front of this room, run straight northwards through the middle of the central nukage puddle's southern half, surrounded by the blue floor insignia outside and the table will sink, granting you access to the berserk. Entering the blue key room raises the floor insignia, so walk towards the northeastern door to lower it again. However, it is the not the table that counts as secret but the narrow strip of lava (sector 119) around it. It cannot be registered, as doing so requires your feet to touch it and you cannot cross it without being lifted out of reach by the nearby floor.


  • In the middle of the map, near the pinky crusher, there is a cage containing a soul sphere. The north side of this cage has a few vertically offset, loose-looking bars, which can be passed through by stepping up on the small ledge just north of them and running into the cage. The steel block blocking the cage entrance can be lowered from inside by approaching it, which also opens the similar cage with armor bonuses opposite the pinky crusher.


  • Linedef 243 is a walkover trigger (Type 86 - WR Door Open Stay) that opens a door with a Tag of 15. However, no sector in this level has a tag of 15.
  • Similarly, the door leading to the cages in the middle of the map has a crusher-deactivating trigger (linedef 400) on the inside, but it is not tagged to affect any sectors. This line additionally blocks attempts at using the door from the inside until the player gets closer to the door than is normally required.
  • 0% Secrets is the maximum possible, because the only secret in the level cannot be triggered.
  • Northeast of the rocket launcher room (since the rocket launcher is only present on hard skills in single-player mode: It is the big room in the map's southwest.) is an imp (Thing 77) facing a door. If you cross his line of sight, he will ignore you as long as you do not fire a shot. This is due to the same bug that affects one shotgun guy in Doom II MAP02: Underhalls, wherein the engine compares the wrong set of coordinates while calculating line of sight. The imp is located at (832,960) and there are multiple vertices in other rooms with a y-coordinate of 832.
  • At the southwest square area, opening a north wall of the square (linedef 19) reveals a missing texture, manifesting as a flat bleed.
  • A door that opens when the player gets near it in the northeast has a pegging issue (linedef 1256) that makes the door appear to be crumbling away instead of sliding.

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 0:30.29 Eric Baker (The Green Herring) 2010-09-14
NM speed 0:30.83 Eric Baker (The Green Herring) 2010-09-14
UV max 3:58.89 Erick Tenorio (GuyNamedErick) 2018-03-26
NM 100S
UV -fast 5:34.71 Andrea Rovenski (Cyberdemon531) 2023-02-07
UV -respawn
UV Tyson 7:45.74 j4rio 2019-07-12
UV pacifist 0:31.97 Eric Baker (The Green Herring) 2010-09-14
NoMo 8:19.43 TeamTNT 1996-04-09 Walkthrough demo
Stroller 0:57.34 Graham Burgess (Grazza) 2019-07-26

The data was last verified in its entirety on February 23, 2023.

Miscellaneous demos[edit]

Run Time Player Date File Notes
Alternate NM100S 0:50.29 Eric Baker (The Green Herring) 2015-04-03 Demonstrates a theoretical route assuming the secret is fixed to be obtainable.
Includes a copy of the level with the secret fixed for verification.

The data was last verified in its entirety on January 16, 2022.


Player spawns[edit]

This level contains four spawn points:

  1. facing north. (thing 3)
  2. facing west. (thing 4)
  3. facing east. (thing 94)
  4. facing south. (thing 95)


Map data[edit]

Things 253
Vertices 1717*
Linedefs 1748
Sidedefs 719
Sectors 225
* The vertex count without the effect of node building is 1502.


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

Technical information[edit]

Inspiration and development[edit]


See also[edit]


External links[edit]