AAAAAAAHHHHHHH!!!!! (brag about this awesome game)

[Googolplex]

Glad to hear you played the game as it's intended.
Yes, Amnesia is probably the best horror game ever made, but I can't say it's the scariest. Of course, it is one of the scariest games, but there are some others:

Outlast and Silent Hill (1-3) are also extremely terrifying. But that doesn't mean they are automatically better. I think Outlast is only 2nd class at all, but the asylum and the psychopaths are a true nightmare. Scratches and Dark Fall Lost Souls are also quite fantastic!

I also think that Penumbra Overture was the best in atmosphere, puzzles and design.
Black Plague was far scarier, but Overture was a more solid experience.

Nevertheless, Frictional Games are the best people who create horror stories.