All Working No One Lives Forever Cheats - Playstation 2

Mission select
Highlight the "Load Game" option at the main menu. Hold [L3] + [R3] and press [X] to enter the "Select Mission" screen. Choose any starting point from any mission, including debriefing/training. This will not effect your memory card unless you save the game. Press [Triangle] to exit the screen.

Alpine Intrigue: Mystery weapon
In scene 4 immediately after you blow up the barrels, go a few turns and you will take a left curve at one point. There are two enemies there that you kill, then two more men that will come running around the corner. Kill them and directly in front and above you is a gun with a wooden stock and a magazine that protrudes out the side. However, you cannot reach it.

Berlin By Night: Hidden message
Make your way into the sewer. At the foot of the ladder, there will be an impassable grate to your right. If you look through it, you will see a sign that says "Mandatory FPS Sewer".

Sleeping woman
When you first start out in the training building, walk around until you find a window with a blind all the way down, one crooked, and one three quarters of the way up. A woman will be sitting there with several "Z"s floating around her head. Give the window a good whack and she will jerk a bit and get back to her laptop.