Motorman: Get 25 kill with a car, tank, and plane. 
Parachutist: Use the parachute four times. 
Milkrun: Fly a plane for twenty minutes. 
Bomb Run: Launch an air raid killing at least one enemy. 
Wheelman: Get 50 kills using a car, tank, or boat. 
Fighter Ace: Get 50 kills using fighter planes.