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[[Image:MAP07 map.png|thumb|300px|Map of MAP07]]<br clear="left" />
Press the switch to lower the walls. Kill the 2, 4 or 7 [[Mancubus|Mancubi]] and more walls will lower, revealing [[Arachnotron]]s (A). Kill them all and you will be able to end the level by pressing the eye switch in the middle of the map (B). Use the [[blur sphere]]s to avoid the monsters.
The only secret in this level is the area surrounding the exit switch. Therefore, it is impossible to exit the level without triggering the secret.
The northwest corner of the map has a secret alcove, housing a [[BFG 9000]] and an [[energy cell pack]], along with another exit switch. In single-player or coop, it is inaccessible; it is only opened when a deathmatch player spawns in that location. This is usually discovered when a player uses the IDDT or IDCLIP [[cheat code]]s. If a player enters the region through noclip cheat, it can be disabled safely because the wall can be opened from inside.
#A possible bug or warning that occurs is that if the last 2 arachnotrons die at the same time, it may cause the stair step surrounding the exit in the center to rise twice, making the exit in the center become seemingly inaccessible, but if this happens, you can still access the exit by running across from the lowered northwest or northeast platforms.#Not really a bug, but more of a warning. If this level is played on Nightmare difficulty or with the -respawn parameter set, the arachnotrons that endlessly respawn may cause the stair step that surrounds the center exit to continuously rise each time all of them die, making the exit in the center inaccessible.
===Routes and tricks===