Nightmare Fuel: Five Nights at Freddy's
(In case you're really, really scared by now, go right down
to the bottom and click the link.)
There's a few good reasons
as to why this game is considered one of the scariest
of 2014. Examples include...
for fan-work related Nightmare Fuel. See here
for the sequel's page and here
for the third game's page.
Now if you're really scared by now, go here.