Original Night of the Living Dead. Had an honesty to it that creeped me out, like watching a documentry. And the part where the zombies begin to eat those blackened corpses.... Truly a classic. Exorcist. The girl spider-walking down the stairs. The sense of dread that emanated from her room, in an otherwise well-lit and clean place. The Ring. That one really got to me. The combination of hideous visuals accompnied by screeching static, briefly flashed, hints of unspeakable abominations and a creature that haunts between worlds. A reporter that delves into bizarre deaths, spiralling into a world of madness and the supernatural. Most Lovecraftian ghost story I have ever seen. I ended up unpluggling all the TVs in my house. The Birds. Maybe the scariest movie I have ever seen. Crows perched on a school's jungle gym, like ghouls, waiting for the children to come out and play. I never thought you'd be a Resident Evil fan. Those games scared the shit out of me, but I considered the games a bastardization of an otherwise incredible storyline. Hitchcock's Pyscho started the slasher genre. Those movies are lame. There's nothing to them. It's all formula and cheap scares.
Mountainhare, the Devil's Reject: "Audition" remains one of the few films that I've ever cringed at. The piano wire scene. Wow. Krakatoa: "Audition" is a recent film (I think it was released in 2000?) out of Japan. It's about a man who pretends he is auditioning for a movie in order to get a new wife.
Zombie the flesh eaters was the scariest film for me, I peed on myself. "The Others" was also very scary, more like ultra creepy, try watching it with the lights out.