There are two secret areas in this level. The first is found at the first house where you have to exit your tank. Go to the barn door and jump at the wall to the left of it. You will go through the wall into a room with a giant chair and a very small door with a green light shining out. There are also two health packs in the room. The second secret area is at the second house. Go inside and clear out the house. In the back room on the right is a window where you can shoot the machine gunner that was shooting at you while you were coming into the house. Go back downstairs and outside. Jump over the sandbags and onto the barbed wire. Follow it to the house. You will go through the wall and down a hallway. At the end is a room with a Nazi UFO and four health packs.