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 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 128)
 * 6) 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 134)

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

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