Secret Places (5)
The first secret is the hardest to find. In the outside area at the beginning, use a jetpack and search the blue building wall for the graffiti shown in the image. Fly through the window directly above the graffiti to find the secret.
This switch is near the car. After flipping it, go to the telephones near the entrance to find that a secret has been opened in their place. (Note: This room has flickering lights. This snapshot was captured in the split second that the room was lit, to increase visibility of the surrounding area).
In the room behind the one-way mirror, press on the sound equipment to open a secret door on your right.
The bookshelf beside J. McClain's desk is operable. It leads down to the area visible from the beginning of the level. Walk near the wooden pole to be credited for the secret place. Also worth mentioning here is the photocopier around the corner from J. McClain's desk. "Sitting" on the photocopier produces Duke's photocopied arse in the print tray! This gag slipped past me for ages.
The map behind the yellow access card desk can be opened to reveal the last secret place.
"Open J. Dredd": Hidden in a dark corner nearby the blue access card (nightvision goggles required). This is supposed to refer to the location of the secret level nuke button, as described below, but it is far more confusing than it is helpful. Firstly, this portrait doesn't appear to have any resemblance to Judge Dredd. Secondly, the actual portrait that you have to open near the end of the level is of George Washington, not the mystery portrait shown with the secret message. In fact, this portrait does not appear anywhere else in the level aside from this secret message, despite the fact that it is indicated as being in use (exactly where it should be at that) in the map editor. Lastly, the Judge Dredd nameplate appears inside the secret area with the nuke button! Much bloody help that is! By the time you find the clue, you're already standing in the secret room! These clumsy mistakes may have been due to the subtle changes made to the map after Levelord left 3D Realms.
Open the portrait of George Washington (not of Judge Dredd as the previous secret message implies) behind the judge's podium. This is probably the easiest secret level to find in the entire game. Personally, I consider it even easier to find than the regular ending. The secret nuke button warps to Area 51.