It should go without saying that horror games are designed to be scary. That's pretty obvious, really.
For the most part, we learn to anticipate when something big and bad is going to happen. The usual indicators, in no particular order, are: musical swells, save points and more ammunition than you'd find scattered around the place.
Sometimes, though, sometimes... games like to catch us unawares.
It can be a full-fledged boss fight, or even just a quick toe to toe to keep you on yours.
Honestly, who was expecting an insect-hosting matriarch or a spider-monkey Samara-like encounter out of the blue? Or to fight a towering, genetically engineered super being in the smallest confines ever?
There are also times when it's not a predetermined boss fight but the tonal shift that makes these following examples more unnerving. Whilst the game may have a foreboding overtone, there's still something to be said about something catching us completely off guard. Well, I guess that's what makes them scary, right?
So gather up something to hide behind, rally your nerves and stop looking in dark corners, as we look at some downright creepy monsters that really caught us at the worst of times.