@Simon_Fitzgerald: I was just about to ask that. I've done the ending part, only the secret stuff is left to be done.
[spoiler]
There's a hidden door located in the mountain, on the swamp side. I know there's a walkway above the cinema room, along with more corridors and rooms that link up that area with the desert ruins I believe, as there's a locked door as well. Not sure how to access any of that. Does it have anything to do with the black monolith structures? I know how to solve those, but I haven't completed one yet. A small hit would definitely be helpful!
[/spoiler]
