I will start this walkthrough on Hard skill level. There is nothing special in this level; the only thing at the beginning of the level is the welcome. The music file for this level is entitled: HESBACKA.IMF.
When you start, Duke will escape from his cell. He can shoot two cameras and a napalm bomb box. (If you shoot the bomb before it hits the ground, it does not explode.) Shoot the wall to the right. Duck when you see the blue guard. Shoot him four times. Shoot the next camera and the wall to the right. There are various boxes next; one empty blue, one red bomb, and one blue TV. Shoot the hands when they try to grab you and the cameras. There are more boxes so shoot them. Shoot and retreat the next two blue guards.