MAP18: The Courtyard (Doom II)

MAP18: The Courtyard is the eighteenth map of Doom II. It was designed by Sandy Petersen and uses the music track "Waiting For Romero To Play".

Walkthrough
To get out of the first room, you must shoot the door (A). Behind the door is a trooper and some imps. Shoot them and proceed through the archway.

Secrets

 * 1) In the northwest corner of the courtyard is a triangular area of grass between a couple buildings. Walk into the northern corner of the triangle to be teleported an otherwise unreachable ledge in the maze area (B).
 * 2) Inside the maze area are two blue-walled skull switches (C). The one in the southeast corner of the maze has a secret alcove containing a Chaingun behind it (D).
 * 3) After passing through the northeast trail of armor/health bonuses radiating from the central pillar in the courtyard, a door opens on the west side of the yard (E). Behind it is a spiraling hallway leading to a BFG 9000.
 * 4) After passing through the northwest trail of armor/health bonuses radiating from the central pillar in the courtyard, an alcove opens in the northeast corner of the yard. Close to this alcove is a "+"-shaped structure (F). Press the switch on the back side of this structure to lower a teleporter back in the alcove you just opened. Go through to be taken to a new secret area (G).

Bugs

 * Sector 15 is a hidden aperture, with ceiling and floor heights set to 144 (the floor later drops to 16). Bordering it on the sides are two linedefs (451 and 459) that are set as two sided. The front sidedefs of both linedefs are part of sector 15, but the back sidedefs are each defining unique sectors (16 and 38) which are set to floor heights of 0 and ceiling heights of 192. As these sectors only have one sidedef each and no associated middle texture, they open to the outside map. One provides a view of an adjacent room, while the other provides a hall of mirrors shimmering effect.

Records
The Compet-N records for the map are: