That game seriously fucked with my mind in my sleep! But zombies were an irrational fear of mine as a kid because of my dad and my cousin teasing me about them and details from the Dead movies so for a while every leaf I heard crackling outside became an undead monstrosity shuffling it's way toward my window to rip of my flesh with its teeth...
I was really scared of zombies, too. I was so scared of the redeads from Ocarina of Time that I had nightmares about them for years. The death screen for the original RE2 really freaked me out.