I'm going to comment a bit on why I don't find Outlast very scary, but I haven't finished the game yet. I'm just past the
Spoiler below!
sewer segment.
I think the game just throws things in your face and says BE SCARED while playing scary music. I don't think this is very scary as it's easy to see it coming and after a while these things just give you no reaction. This is coming from someone who got scared playing bioshock and I've never felt myself getting desensitized from horror after playing a bunch of horror games. There's very little build up I've seen at all (yet, at least). It's just a scarefest. The monsters I don't find scary at all either, I think the fat one is funny because his voice acting is so bad.