5. Silent Hill 2 (PS2, Xbox, PC) - Pyramid Head eats a spear
Of all the twisted creatures encountered across the four Silent Hill games, the silent hunter known only as Pyramid Head left the biggest mark on gamer psyches. Voiceless and faceless, he'd appear at inopportune times throughout Silent Hill 2, his presence announced only by the scraping of his big, big knife on the floor.
When you confront him for the last time, you'll have that knife in your possession, and you'll be ready to shove it up his undead ass for all the times he popped up and tried to murder you. Sadly, he robs you of the privilege; while you can deal some damage, the killing blow is all his. Wow, monsters so deadly that they're a danger even to themselves? That's kind of terrifying, we guess.
(And before you complain, we're not counting the infamousdog ending, because it's intentionally not scary. That's just too easy.)