E2M2: Mysterious Halls (Slaughter Until Death)

E2M2: Mysterious Halls is the second map of Slaughter Until Death. It was designed by Denis Möller, then known as Panza, and includes "Demons on the Prey" as a replacement music track.

Secrets

 * 1) After you get the red key, a door has opened in the brown hallway revealing some imps and a switch. Pressing that switch will open a huge area in the marble hall with demons, imps and spectres, and also a chaingun. Press on the misaligned marble wall in the west of the newly-opened area to find a lift that will take you to an imp's cage from the beginning of the level, including a box of shells, a medikit and a backpack. (sector 55)
 * 2) When you enter the teleporter from the marble hall, you'll find yourself above a slime pool. After you raise the walkway, grab the soulsphere. A door will open revealing some imps. Open the back wall of the room to get the secret with a computer map. You can also press the end of the hallway to reveal an armor. (sector 89)
 * 3) (sector 91) is unused, so only 83% of the secrets is the maximum.
 * 4) In the marble hall, press the misaligned southeast wall (behind the corpses) to find some shells and stimpacks. (sector 93)
 * 5) After the walls around the blood fountain open to reveal a lot of monsters, in the newly-opened room, use the stone wall without green on it to find a medikit and a spectre. (sector 128)
 * 6) After the blood room with the cacodemons, in the stairway leading to a blood fountain near the end of the level there is a stone wall without green on it. Press it to find a chainsaw, a stimpack and shells. (sector 134)

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

Player spawns
This level contains four spawn points:
 * 1) facing south. (thing 164)
 * 2) facing west. (thing 165)
 * 3) facing west. (thing 166)
 * 4) facing north-west. (thing 218)

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