Complete the following achievements to unlock Microsoft Gamerscore points.

Achievement	How to unlock	Points
100%	Achieve 100% in the single player challenges.	150
A God Among Men	Win by scoring more points than all other players combined (in 3 or 4-player mode).	75
Comeback is a B****	Be the player with fewer points at sometime and still win the game (in 3 or 4-player mode).	100
Everybody's Dead (secret)	All players have died in a short period of time (in 4-player mode).	75
Eyes on the Prize	Retrieve 5 Treasures in a row in Treasure Hunt mode.	50
F*** Da Police	Do not get killed in a Police Chase game.	50
Minute Madness Expert	Get most of your kills when the Minute Madness is enabled.	100
No Need No Gun	Get five kills without using your gun.	100
Possessive	Be the first one to capture the flag and never let go of it.	25
Serve and Protect	Kill at least one player every time you are the police in a Police Chase game.	100
Souvenir Collector	Win a Dog Tag game with least kills.	75
The Flag is Mine	Keep the flag for two straight minutes in Capture the Flag mode.	50
Triple Killer	Perform 3 Triple Kills in a single match.	50