Complete the following achievements to unlock Xbox Live Gamerscore points.

Achievement	How to unlock
Ace Dragon Rider (25 points)	Multiplayer: Scored "S" rank 3 times.
Go-along! (25 points)	Multiplayer: Cleared mission 25 times.
Seeker Squadron (15 points)	Multiplayer: Completed 5 multiplayer missions.
Seekers Unite (10 points)	Multiplayer: Completed 1 multiplayer mission.
Strike from the Skies (50 points)	Multiplayer: Completed all multiplayer missions on any difficulty.
Trying to Rewrite the Past (25 points)	Multiplayer: Defeated the White Phantom 3 times.