There is a dome with a ladder next to it. Climb up to get onto the ledge. This trick requires two players and you must be able to talk to each other. Have a player climb on the ladder as far up as they can without taking their gun out and
walking off. Then, have the other player climb up the ladder. As the player climbing up the ladder hits the person at the top, have both players press Left Analog-stick Up and look at the dome with the other Analog-stick. You should keep going up until you fall onto the roof part or inside the dome. Note: To go up high enough to get inside the dome, this action needs to be timed perfectly. It is very difficult and time consuming if not done properly Once in the dome, you cannot be shot unless you step outside. You can shoot out and grenades cannot hit you.