Five nights at freddy's. The story and overall scheme of the game are contrived, at best, but holy hell it's scary.

Metal Gear Solid V: Ground Zeroes

The thought alone that we could see more of these $40,- games that are just 3 hours long, is really scary.

On topic though: Probably P.T. or Outlast if you're looking for a full game.

P.T.

Basement Crawl

Also this.

$40 demos, yeccchhh.

Have you had your fun now? Good. Now don't turn this into a moan topic about 8th gen. We're discussing horror games here.

By the way mine would be PT, that thing was ridiculous!

P.T

easily Dont starve. thats shit is fucking scary.

Very fun, thank you, though I do wish I had beat JoeAcelotti to the punch.

Super Mario 3D World. I never knew a Mario game could sell so badly until this game released... and the scariest thing is... it's a really great game. Scary...

curl-6 said:
Metal Gear Solid V: Ground Zeroes

The thought alone that we could see more of these $40,- games that are just 3 hours long, is really scary. 

There ya go