Complete the following achievements to unlock Microsoft Gamerscore points.

Achievement	How to unlock
Behind the Scenes (100 points)	Activate all Commentary Nodes with the Developer Commentary Modifier enabled.
Gone Home (100 points)	Complete the game.
Homerunner (100 points)	Complete the game in less than 1 minute with no Modifiers enabled.
Letters to Katie (200 points)	Complete the game having found all 23 of Sam's journal entries.
Speedreader (200 points)	Complete the game having found all 24 journal entries, without Modifiers, in less than 10 minutes.