This is a awesome horror game and its only $20.00 on Steam.
Check out the review.
Amnesia: The Dark Descent for PC at Shacknews - PC Games, PlayStation, Xbox 360 and Wii video game news, previews and downloads
Beat the game. It's great. If you like it, you should play Penumbra: Black Plague. Amnesia is basically the spiritual successor to it.