Level 4: Holding Area

At the start, hit the switch in front of you to lower the floor.

In the dark room below, kill all 3 Spectres (enemy count varies by skill level). A door in the south part of this room will open once all enemies are defeated.

Go through the south door and follow the right-hand wall. Kill any Zombiemen, Imps, or Demons in your way until you reach a room with 3 switches.

Hit all 3 switches in this room.

Turn around and leave the room.

Back outside, follow the right-hand wall again to another room with 3 switches. Kill any Demons, Spectres, or Shotgun Guys encountered.

Hit all 3 switches in this second room.

Turn around and leave this room.

Back outside, follow the left-hand wall to a door. Open it and go through.

In the next area, go through the opening to your right.

Head up the stairs.

At the top, go through the opening in front of you.

In this room, you will see 4 switches on your left, from your current position to the far end.

Get to the second switch from the door across from you and hit it.

Return to the switch next to the opening you entered this room from and hit it.

Hit the switch to the right of the one you just activated.

Finally, hit the switch next to the door at the other end of the room.

After a few seconds, you should hear a door open. Open the door in the southeast part of this room.

Kill the Shotgun Guys inside and take the teleporter.

Upon teleporting, run across the platforms to reach the opening at the other end.

Go through the opening.

Kill the Imp or Hell Knight (enemy type varies by skill level).

Hit the exit switch in this room to access the secret exit.