In the level where you need to escape from the base, it can be done very quickly.
You appear in the truck. Remove the sniped hour on the left on the tower. No one no one should decrease. Right at the rate, between the two-story building and tanks have boxes. Get to them, without entering the eyes of the cameras, jump into the boxes, from them through the barbed wire down and everything is on the plan. The main thing is that you do not need to open any gate and.