MAP01: The Fistula (Master Levels)

The Fistula is a map that is part of the Master Levels for Doom II. It was designed by Christen Klie, and is contained in the file FISTULA.WAD. In the PlayStation Doom port it is the sixth map of the first episode and uses the music track "The Foulness Consumes".

Walkthrough

 * Letters in italics refer to marked spots on the map. Sector numbers in boldface are secrets which count toward the end-of-level tally.

Essentials
Yellow key

In the starting place (A) open the northern door (in fact, these are the lifts masked as doors). In the crossroads room (B) head to the east and forth to the lift. Using the lift descend to the very bottom and go to the south. Head to the west and beware the trap of teleporting monsters. Use the lift, head to the south, come around and to the very end at the east. Walk upstairs to the arrow that points to the wall. Open the wall, head to the area with slime in the middle. Carefully walk around the border about the pit (you can get out by pressing use on the "poison" sign). Enter the teleporter. In the starting area (A) there is the teleporter lower with the yellow key. Grab the key. You will teleported back to that area with slime pool. You can re-enter the teleporter.

Blue key 

Return to the crossroads area (B). Use the northern way and open the yellow door. Grab the blue key inside. The room is also contains much ammo.

Red key

In the crossroads (B) use the western way. Open either blue bar in the south or north and walk upstairs. Take the red skullkey.

Exit

Come back to the starting area (A) and use the eastern door (the lift, more precisely). Press the green button in the west of the room to lower the platform, using the platform get to the tall room with four columns and staircase. Go outside, walk around and use the red key door in the east. If playing on the PC version of Doom beware the arch-vile in the exit room. Press the switch.

Secrets

 * 1) At the foot of the staircase in the north connecting small outside area where you do obtain the blue key and the optional area, a wall segment in the south differs noticeably in appearance from the others. This is a secret door that requires the red key. Once you obtain it, open this door to find a room with a megasphere guarded by former humans. (sector 107)

Current records
The records for the original map on the Doomed Speed Demos Archive are:

Trivia
In medicine, a fistula is an abnormal connection or passageway between two epithelium-lined organs or vessels that normally do not connect.