Accomplish the indicated achievement to get the corresponding number of Gamerscore points:

Easy Days (10 points): Complete two days on Easy Street.
Team Player (15 points): Obtain a score of 8,000 of more during an Xbox Live Co-op match.
Bundle (10 points): Pick up 5 bundles of newspapers in one life.
Smasher (15 points): Break 30 windows in one day during an Xbox Live Co-op match.
Stunt Master (15 points): Finish the training course two days in a row during an Xbox Live Co-op match.
Good Score (15 points): Get a score of 3,000 points or more.
Perfect Aim (15 points): Deliver newspapers to every subscriber on a Monday.
Hard Day's Work (15 points): Deliver 7 or more newspapers in one day on Hard Way.
Easy Week (25 points): Complete one week on Easy Street.
Vandal (20 points): Win an Xbox Live versus match whilst also obtaining a breakage bonus of 2,000 in one day.
Racer Boy (25 points): Finish a single day in 60 seconds whilst also delivering 5 or more newspapers to someone's door.
Hard Week (20 points): Complete 2 days on Hard Way.