Flip it to lower a platform just outside. Proceed through the hallway, towards the iron bars (which will automatically open), and up the stairs, arriving at a wooden skull switch. Continue along the walkway to the left about halfway, and across the newly created bridge to the red keycard ( F).ĭrop down into the slime to the northwest of the central circular walkway and head through the red door ( G). Flip the satyr-faced switch and return to the main area once again. Continue through this room, up the small staircase, and along the newly risen ledge. Flip the switch to raise a ledge just outside ( E). Make your way along the walkway to the opposite end of the area and go through the blue door ( D). Now return to the main area of the level. Once it's been killed, re-enter the room and pick up the blue keycard ( C). Take cover behind either side of the door if needed. Once you pass through the doorway inside the structure, the first arch-vile of the game is released ( B). Proceed up either staircase into the structure ahead of you. Climb the stairs and take out the arachnotrons and cacodemons that attack. Proceed along the walkway ( A) to your right and take a right across the bridge into a rusty metal area. Sector numbers in boldface are secrets which count toward the end-of-level tally. Letters in italics refer to marked spots on the map.
