So I managed to pick up Amnesia: The Dark Descent today. The plot of the game is you wake up in a old castle with no idea what happened. It's a first person view, but it's not a shooter. In fact, you can't attack at all (so far). You go through the rooms exploring and doing puzzles. The character is a bit afraid of what's going on, so you have to stay in the light (lighting torches or using a lantern, both which are limited in supply).
You have to try to figure out what's going on, and trying to explore the castle. You get a letter from yourself in the very beginning telling you what is going on.
To put it simply, the game is creepy as hell. At least once or twice the hair on my arms was standing up, and I sure as hell was surprised when I saw my first enemy, and ran like crazy.
I highly recommend it. Check out the trailer on Youtube: http://www.youtube.com/watch?v=M627-obxNzg