Resident Evil 1/Nightmare Fuel

• The game warden's diary, where you read exactly what happens to someone as they transform into a zombie, are extremely disturbing. "Itchy itchy Scott came ugly face so killed him. Itchy. Tasty." And you are attacked by said zombie as soon as you've finished reading it.
  • Most people will see the rattling closet, and even if scared, know that the zombie will come out. The bad thing is when the door opens, you see a box of shotgun shells or a taser battery on the ground, the equivalent of resident evil gold bars, right behind the zombie. Even worse? Once you skip or run around this zombie, ANOTHER ONE APPEARS IN FRONT OF THE DOOR, hidden by the freaking camera angle.
• The Chained Creature, aka Lisa Trevor. There's the first cutscene, then the unexpected appearance in the underground caves, but the journal entries and the creature's general backstory make it the most disturbing thing in the whole game.
  • • Her pants-wetting anguished "MOOOOOOOOOOOOOOOOOOOMYYYYYYYYYYYYYYYY!" out of NOWHERE.
• The Crimson Head zombies. Nothing like entering a room you killed a zombie in a while back, but you were somehow unable to decapitate/burn it at the time, only to discover that the corpse has disappeared... and then you discover that, not only is the damn thing alive/undead again, but that it's stronger. And faster. SUPER fast. And it has CLAWS. They let out player-bowel-voiding noises, have almost shining-neon-white eyes, crimson-red skin (hence the name), and COME OUT OF NOWHERE!
  • The worst possible way to run into one of them? When you only have a pistol, and they're between you and where you need to get to, and their back is turned to you. You can see their face reflected off a mirror, but they're completely oblivious if you keep your distance, so they just stay in one place, waiting for you to make the first move.
• The L-shaped hallway. This is a hallway where, as you walk through, you catch the attention of two Cerberus dogs outside. In the original, they come crashing through the windows and attack. In REmake, the window glass cracks loudly... but the dogs don't come crashing through, so you make your way to the other end of the hall watching the windows in wide-eyed paranoia. And of course, should you think that was just a Red Herring and decide to come through that hallway from the other side, the dogs do come through the windows.
• Seen the uncut intro to the original, where Joseph gets gruesomely mauled to death by zombie dogs? It's worse in the remake.
• There's a certain hallway that you go through multiple times, with nothing interesting happening each time. But for some reason, after a certain number of trips there, two crimson heads decide to jump in from the windows.
• Jill pulling the stopper out of a bath tub.
• There's a freaking door that has a broken doorknob that can break after a certain number of uses, blocking off a major shortcut and forcing you to backtrack around the entire mansion. Barry fixes it in Jill's version, but Chris is out of luck.
• There is a room where you find a dead zombie and the body of a scientist who hung himself. Then a note that explains the heart-wrenching process of him having to kill his best friend and then hang himself, with the pistol used to kill himself on top of the note — called the "Suicide Pistol." But the worst part is that you go into an adjacent bathroom to collect an item, then hear a *THUMP* as he FREAKING CUTS HIMSELF LOOSE.
• In the 'Advanced' mode of "Directors Cut", some of the zombies are able to move much faster than their regular shuffling companions. Of course, we're never actually informed of this at any point (not even in the manual), so you won't know that this is the case until you encounter one during play. Oh, and there's absolutely no way to tell them apart from the 'regular' zombies either... cue paranoia and genuine fear of the lowliest enemy in the game!
• So, you just came back from a trip through the garden and the lab underneath and are back at the mansion with a shiny new key to unlock all of those pain in-the-ass doors. So far, the worst regular enemy you have faced is a giant spider. Then a cutscene plays. First person perspective of something running through the garden, bashing open every door it can find. No problem, you may think. Just another Cerberus. Then you see a long, green arm pull open a door. The door you just came through, the door right behind you. Wheel around and come face-to-face with a green humanoid squealing beast that — if your health is low enough — will leap across the hallway like a frickin' Ninja and slice your head off. Say hello to the Hunter. And if you manage to kill this one, his brothers have now taken over the mansion. And most of the zombies are gone....