Doom/E3M5: Unholy Cathedral


 * Central region: North-west teleporter (which is glowing slightly) teleports you outside. All other teleporters return you to the center. This central region is easy to get itno, but isn't required to complete the map.
 * North-east section: The doors out of this section are one-way.
 * Blue key: Located at the top-most portion of the map. Flip the switch behind the north-east crusher to lower the key, so that you can grab it.  The north-west switch lowers the chaingun, and the south-east corner extends the side alcoves, and revealing a rocket launcher in the middle right alcove.
 * Exit: The exits on the right-hand side.
 * BFG: From the exit, take the right-hand path. The door will close behind you as you walk past, and remain closed for a while.  Attacking will alert a swarm of monsters which will teleport in from the center.  The BFG is located in the small room to the right. To exit this area, flip the switch to the right of the door in the BFG room.

Secrets

 * 1) From the starting location, take the left-most door, and open the secret door on the left wall.  Around the corner and across the blood pit is light amplification goggles.
 * 2) On the western edge of the map, you can find a small arena-like area with demons, and a plasma gun.
 * 3) To reach the north-west portion of the map, you need to cross over what appears to be some water.  This opens a door allowing you to proceed.


 * 1) Enter the central region from the south-west corner to open the western pillar.
 * 2) Enter the teleporter in the north-west part of the map to open the Southern pillar. This reveals a yellow skull key.
 * 3) Enter the central region from the south-east corner to open the east pillar.
 * 4) Enter the central region from the north-east to open the north pillar.
 * 5) With a yellow skull key, open the secret wall on the eastern edge of the central area - it is to the right of the mysterious writing, and reveals a chainsaw and supercharge.