re2. first game i owned on my first ps1 never used one before so i didnt know how the controls worked and at the time i was very afraid of zombies and on top of that i did my first game at night so yeah i died so many times in that first section and the zombies sounded and looked so real at the time i was scared shitless of that game. id only play it in the daytime and if i wasnt home alone.
silent hill. the first time the town shifts on you and that god awful siren wails out over the town. my skin crawled everytime that happened.
re3 nemesis. the first time nemesis opens a door after you run into anther room to escape him.
re1 remake. red head zombies and that chick zombie.
the thing: anytime one of your temmates suddenly flips out and becomes a thing you never were sure when it would happen and with limited ammo and health packs it was always a better option to run like a bitch than fight lol.
deadspace 1: much like a thing moment when those

ed up alien posessed people starts coming at you from all over its hard not to be intimidated.
re games in general : giant anything spiders, snakes, sharks crocodiles they always pop up out of nowhere and you either run or waste ammo in hopes of killing them.
the suffering 1 and 2 the flashbacks and many of the enemy encounters were very intimidating and scary.
superman 64: its scary to think someone could take gold like superman and just completly

it up so bad its pretty much unplayable.