Complete the following achievements to unlock Xbox Live Gamerscore points.

Achievement	How to unlock
Case Closed (50 points)	Complete the game with 100% progress
Grey Matter (10 points)	Solve every riddle
It's in the Bag (10 points)	Solve the first riddle
Marksman (30 points)	Kill every target without wasting a bullet
Nothin' But Net (50 points)	Win every QTE in one try
Speed Racer (70 points)	Complete the game with 100% progress in record time
Summa Cum Laude (50 points)	Win every riddle in one try
Super Sleuth (40 points)	Complete the game
The Postman Rings Ten Times (30 points)	Open every mailbox
Tour de Force (10 points)	Win every QTE
With Flair (40 points)	Complete the game with Rank A
With Moderation (10 points)	Win your first QTE