I beat Amnesia last night. It's a pretty effectively scary game, although not quite as scary as reddit would have you believe. I mean I would probably argue that it is one of the scariest games I've ever played (in some ways scarier than the Silent Hills but in other ways not quite as scary) but they make it seem like it's impossible to play because of how scary it is, which isn't really true. But it is scary! I liked it a lot!
Also my favorite part of the game is near the end when there is a picture of Alexander near his study or whatever, and if your sanity's low enough it becomes distorted and I think that was actually the creepiest part of the game for me. It literally sent a chill down my spine which is extremely rare and my favorite kind of scare.