Complete the following achievements to unlock Xbox Live Gamerscore points.

Achievement	How to unlock
Attacker ( 10 points )	Capture five flags.
Best Squad ( 20 points )	Be in the best squad on all three maps.
Defender ( 10 points )	Defend five flags.
Master of your domain ( 20 points )	Get one kill playing as each class.
Melee Man ( 20 points )	Melee kill one enemy player.
Milkrun ( 20 points )	Fly a plane for 10 minutes.
Motorman ( 20 points )	Get one kill with car, tank and plane.
Parachutist ( 10 points )	Use the parachute once ( 2 seconds).
The Pacific Campaign ( 10 points )	Win once on every map as any team.
Tour of Duty I ( 10 points )	Play 30 matches.
Tour of Duty II ( 30 points )	Play one hundred matches.
Veteran ( 20 points )	Cap 25 enemy flags.