Behind the blue door is the exit room the exit switch is visible across a nukage canal, but inaccessible (F). Get the blue key, then return to the central courtyard and go down the stairs to the north. This raises the 'box' pillar in the previous room to reveal the blue key (E). Shoot the barrels from a safe distance and press the switch.

Cross to the far wall of that room and turn left you should see a switch behind a row of barrels (D). Leave the room through the other yellow door, continue west through a room with a large 'box' pillar surrounded by four torches, and go down the stairs and through the red door. Turn right, open the yellow door, and pick up the red key (C). Return to the courtyard and go down the stairs to the east. Go down the stairs to the west and get the yellow key behind the fence (B). You begin in a short corridor at the end of this corridor is a large courtyard (A) containing Imps in a cage.

Sector numbers in boldface are secrets which count toward the end-of-level tally.

Map of E1M9 Letters in italics refer to marked spots on the map.

Doom knee deep in the dead secrets