Turok

The second Co-op map is called "Shadowed Paths" and can be quite difficult without some good players. This achievement can be unlocked in a "player" match, or if you have some friends that you wish to play with then you can start a "private" match and invite them to the game. At the start of the mission it is best to use a bow to eliminate the two Snipers and the Rocket Turret. Once you reach the part when you must protect the helicopters, try to avoid leaving the base because there are Sniper outside that will be able to kill you quickly.