Resident Evil 4.
In a series known as the flagship horror series.
This title in particular rarely gets a scare out of me.
I wanted to be scared by it, I played it with loud 5.1 speakers, in a dark room, close to my Television, the swarms of parasitic enemies only made me more intent on killing/outsmarting them.
The blind enemies only pissed you off with their lifebar destroying tactics and they only made one aware that the tank like controls that persisted in all previous RE games are in this one, just with a better camera scheme.
The regenerators got close, I found it a pain to fight them, but once you figure out their strategy, they are ridiculously easy to eliminate.
However, there was ONE thing in that game that made me jump out of my seat.
ONE thing that made me yelp out for one moment.
ONE thing that made the controller pop out of my hands.
This terror that burns in the night caught me completely off guard. For a RE game, you fight A LOT of ENEMIES and you get a relatively good amount of ammo to waste, so imagine my surpise when you've just come back from a action filled area filled with mutant criminals, when suddenly- The enemies stop.
You aren't even aware of it, you're just searching for items to loot, tracing the walls for any missed gems when suddenly.
A GUY POPS OUT OF THE FRICKIN' OVEN AND SCREAMS THROUGH YOUR SPEAKERS!
Here's a victim of Oven Man.
Here's a video of someone heroically defeating the scariest thing in the game.
Here is OVEN MAN's wikipedia entry.
For a suprise scare, it worked. Good job, CAPCOM. OVEN MAN is the scariest thing in your game franchise ever.