Unlock All Levels Press and hold select at the chapter selection screen, then press right, right, left, left square, square.
Hints
Scope on All Guns Entry Location: anywhere
You can use your binoculars as a scope by using the center of them as the sight. NOTE: if what you're shooting is not in the middle you will miss.
Glitches
Float Over a Car Entry Location: Poisson (multiplayer)
All you have to do is go to any nearby unusable open bed truck in a tank, and then park as close and parallel as possible to it. Then you'll have to aim towards the truck and then jump out (the X button) while holding the left analog stick toward the direction of the of the the truck. If done correctly you'll be standing in mid-air.
Merrivile Sniping Spot On the map Meriville by the river their should be a broken bridge with a tank on it. Get into the tank and drive it over the middle bridge. When on the other side go to the broken bridge their should be two windows up high. Line the tank barrel up with the left window and exit the tank. You should be up in the window and you can snipe.
