Escaping from the prison can be pretty perilous, especially if you don't have some sort of cover. What cover is good in a stealth environment? How could we hide from the bad guys? A cardboard box is the answer. Obviously. After going through a few simple stealth sections you'll come up against impossible odds, but the cardboard box in the room to the left is the way forward. If a guard spots you, stand completely still to drop to the ground, and there's a chance that the guard will ignore you entirely. Not bad! After you lose the box, the shadows will be your friend.