The Regenerators and the Chainsaw zombies in Resident Evil 4.
These are the only foes I've ever actually been scared of, mostly because they both make sounds that can be heard from far away (loud breathing for the Regenerators, chainsaw for the chainsaw dudes). When you could hear those noises but didn't actually know where they were, it was as creepy as hell. More than once I turned around to suddenly see one of those chainsaw guys running at me, and I'd get a couple of shots off, but it was too late. Off came my head.
So sad.
These are the only foes I've ever actually been scared of, mostly because they both make sounds that can be heard from far away (loud breathing for the Regenerators, chainsaw for the chainsaw dudes). When you could hear those noises but didn't actually know where they were, it was as creepy as hell. More than once I turned around to suddenly see one of those chainsaw guys running at me, and I'd get a couple of shots off, but it was too late. Off came my head.
So sad.