This game is freaking insane. Basically it's set in the mid 1800s, and your character basically wakes up in a huge castle without any knowledge of the events that have occurred. Everyone in the castle has mysteriously disappeared, except for your character, of course. The castle is haunted.

No pictures. However here's a video of some dude playing through Amnesia... he totally freaks out:
http://www.youtube.com/watch?v=loSzpvq73FY

I'm almost to scared to play it... cause it gets stressful at times.