Complete the following achievements to unlock Microsoft Gamerscore points.

Achievement	How to unlock
Blood and dust (15 points)	Complete the fourth chapter of episode 1.
Captive (15 points)	Complete the first chapter of episode 1.
Conscientious (100 points)	Interact with all the clues and items of interest in episode 1.
Determined (25 points)	Complete the first episode.
Old enemy (15 points)	Complete the third chapter of episode 1.
The past catches up (15 points)	Complete the second chapter of episode 1.
Tying up the loose ends (15 points)	Complete the fifth chapter of episode 1.