Level 17 Secrets

Go to the center of the map, then go east until you come to two staircases leading north and south. Lower the lift to your south by jumping down in the slime just to the west of it and hitting the switch. Just south of the lift is a hidden room with some armor. On the west wall of this room is a lift (#1) leading to a chaingun.

In the north part of the map is an M-shaped structure. Walk north down the middle of the M into the acid lake, then turn around and hit space on the wall. The middle of the M will be lowered, and you will see a switch to your south. Run south and hit the switch. (Actually, you don't have to lower the walkway to hit the switch; you just have to stand in the right place and press the space bar.) A door will be revealed to the east; you can jump into it and get some armor (#2) and a BFG9000.

On the way to the exit, just to the southwest, is a lift. As you go up the lift, you'll notice an opening to the south. While the lift is moving, run into the opening (#3) and into a hallway leading east to a megasphere. (To find the exit, go around the west side of the M-shaped structure and jump across to the south. Go west up the stairs and through the door, then walk up the stairs and hit the switch at the top. Go back down and through the door. Right opposite you is an open door with some chaingunners. You want to go there; take the east side of the M to get there. Go up the lift, kill the arachnotron, and take the plasma gun; a hidden door will open. Go through the door and walk to the end of the hallway, then come back; another hidden door will have opened. Go through this door, walk to the end of the hallway, then come back and go through the other door; a secret door will have opened at the end of the hallway. Keep alternating hallways like this until a third hallway opens up; go to the end of that one as well. Eventually, a door will open revealing the exit.)

Also, the room with the really annoying stairway north and west of the starting point has four teleporters on the floor. The northwest and southeast ones go to the north and south ledges where the monsters appear.

Coordinates

 1  48 <fd400000,f5200000> ( -704, -2784)
 2  89 <fa900000,fd380000> (-1392,  -712)
 3 150 <fb040000,f94c0000> (-1276, -1716)

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