Trivia: Labyrinth of Death: After the first safe room, you have to go and hit the control to manually open a large door. It takes the door a few seconds to finally start opening. There is a horde of zombies on the other side waiting. Once it opens, if you are zoomed in with binoculars, your sniper scope, or happen to be right next to the door, you can see the zombie in the middle at the front is standing there saluting for a moment, and then snaps out of it and starts coming after the players with the rest of the horde.
Trivia: 'City of Ashes': in the hospital scene, there is a board on the wall with the names Dr J. Mengele, Dr W. Heisenberg and Dr G. Rasputin listed, referring to the infamous Nazi-German doctor/anthropologist, Joseph Mengele, German nuclear scientist, Werner Heisenberg, and Russian monk/witchdoctor, Grigorij Rasputin.
