monster may attack you. It is a spider mastermind on Hey, Not Too Rough or lower, two spider masterminds on Hurt Me Plenty, or a cyberdemon on Ultra Violence or higher. Head up the stairs to the right of the front gate and open the door into a mess hall with imps. Head for the hall to the north and open the blue door. Open the red door to the right, and flip the switch that is next to the blue door on the other side. Now return to the fortress entrance, go outside, and head for the southwest part of the map to find the exit teleporter.

In the prison where you find the blue skull key, a section of the western wall in the southwestern cell blockis covered in moss. Open it to find a teleporter leading to the arachnotron cage (sector 158) in the northwestern battlement where you can get a bulk cell, a box of rockets and a computer map.

The portion of the wall south of the kitchen's southern door is covered in grime. Open it to find a teleporter that takes you to the arachnotron cage (sector 368) in the southeastern battlement where you can get a box of bullets and a box of shotgun shells.

In the eastern battlement, a section of the western wall between the blue and the red door is covered with grime. Open it to find a teleporter to the arachnotron cage (sector 97) in the northeastern battlement where you can get a box of bullets and