Complete the following achievements to unlock Microsoft Gamerscore points.

Achievement	How to unlock	Points
City Explorer	Complete Level 2 (New Whasington)	50
Death Tower Explorer	Complete Level 3 (Death Tower)	50
Don't look back	Without using Rewind on Easy/Normal.	120
Earth Explorer	Complete Level 4 (Earth)	50
Expert agent	Complete the game on Expert.	120
FBI agent	Complete the game on Normal.	120
Jungle Explorer	Complete Level 1 (Jungle)	50
Kill them All	Kill 200 enemies.	120
License to Kill	Kill fifty enemies.	50
Never look back	Without using Rewind on Expert.	170
Rookie Agent	Complete the game on Easy.	50
Unfriendly Fire	Kill an enemy indirectly.	50