Scariest game you've played?

So with Halloween coming around the corner I believe I've accumulated enough courage and figured it's about time I get around to playing one of those types of games. Haha, admittedly I am kind of a wuss when it comes to jump scares/paranormal things in movies but I haven't experienced much when it comes to gaming. I have a PS3, 360, and gaming capable PC at my disposal and am looking for a scary game or two to play by myself. I figure who better else to ask than the wonderful Polygon community? =]

With all that being said, what's the scariest game you've ever played? Were you able to play it to completion? Please try to keep it spoiler free.


Thanks!