The east one raises (permanently this time) the walkway to the south alcove.Īfter pressing each switch (it doesn't matter which you press first), you will need to drop down into the sewage and run (you're being harmed) to the staircase (D) to climb back up to the start of this room.

The west one (beware the crusher) opens the south alcove.

There are switches in each of the alcoves thus made accessible, but don't dawdle as those walkways will soon drop again: Run across the gap in the walkway to the structure in the middle, and pull the chain to temporarily raise the east and west walways. Go through this to end up back in the square room. Grab it and return, avoiding the crushers which have started (whch isn't difficult), and near the top of the stairs to the south of the huge room a teleporter has opened with two staircases (C) leading to it. Go in and up either staircase at the top is the Red Crystal Key. Press the switch to open the huge room to the north. On exit, turn left and go down the stairs do a U-turn to your right and go through the door (B). While you're here, there's some other stuff in the niches to the sides of this room, including 25 gold in the niche to the south (the left of the door as you came in). Approaching these bars will open them, and also those preventing progress further north but for now, enter the door for the Chapel Key (and 50 gold, and some other supplies if you need them).

Up the western stairs and around to a barred corridor (A). Up the stairs and press the button, then quickly run across the yellow Sigil-symbol patch on the floor (don't linger, it's a crusher) this opens doors to the west and east. To operate these you need the Crystal Keys. You need to enter the east arch (opposite the door you came in), but it is blocked by substantial bars which need to be removed by operating the switches on each side of them. You enter a square room with a comet symbol in the roof, and three doors (behind stained-glass windows) and one arch (behind a set of small bars) in the sides. Walkthrough to the good ending Mission G9: Shut down the Conversion Chapel Part 3: To the Conversion Chapel

1.1 Mission G9: Shut down the Conversion Chapel.

Doom shut down the portal secrets