Here is the full list of all 12 Alan Wake's American Nightmare achievements worth 200 gamerscore.
Escape the Taken to the motel.
Rewrite reality for the first time.
Make sure Dr. Meadows can take another look at the skies.
Rewrite reality for the last time.
Survive until dawn in any Arcade Mode level.
Get a six-minute survivor streak and over 100,000 points in an Arcade level.
Unlock all of the Nightmare Arcade Mode levels.
Survive an Arcade level using nothing but the flashlight and handheld flares.
Get 70,000 points in any Nightmare Arcade level.
Take out two Splitter spawns with a single shot.
Find all of the manuscript pages.
Defeat 2,000 Taken.