Hmm, I have a few. The pastel shoal level in Yume Nikki, because of one reason: Uboa. FUCKING Uboa. The hallway with Kyukyu-kun leading up to FACE isn't cheery either. Especially because it makes you watch it for a good 10 minutes and all I really wanted to do was turn the game off and go play Animal Crossing.
EDIT: Whoop, ninja'd
The Choir in Amnesia: The Dark Descent. I remember walking into it feeling like this was absolutely the point of no return. This is where shit hasn't just hit the fan, it crashed into it head-on.
Here's IMO, the worst part of the game for me. http://www.youtube.com/watch?v=RVvDROSxrDE
God, that part made me sick watching it, and still does.
And this is pretty tame compared to Amnesia, but the Morgan's Plot crypt in WoW. It's the most unnerving because it's a large dose of SURPRISE CREEPY! when here I thought that there is nothing Blizzard could pull that would make me shit myself at a surface level. Sure, there are plenty of places that turn the disturbing up to 11 once you actually pay attention to the little details and/or backstory (e.g. Naxxramas, Scholomance) but the Crypt is mainly creepy because it has no explanation. Why the hell is this here? Not to mention the fact that everything there is fully functional and has its own sound effects. (There's even a dull heartbeat in the background if you turn your ambient sound up.) You can even kill yourself in there if you're not careful.
Case and point: The Upside-Down Sinners. A bunch of bloodied corpses attached to meat hooks underwater, so they're essentially floating upside-down. Why?!
EDIT: Whoop, ninja'd
The Choir in Amnesia: The Dark Descent. I remember walking into it feeling like this was absolutely the point of no return. This is where shit hasn't just hit the fan, it crashed into it head-on.
Here's IMO, the worst part of the game for me. http://www.youtube.com/watch?v=RVvDROSxrDE
God, that part made me sick watching it, and still does.
And this is pretty tame compared to Amnesia, but the Morgan's Plot crypt in WoW. It's the most unnerving because it's a large dose of SURPRISE CREEPY! when here I thought that there is nothing Blizzard could pull that would make me shit myself at a surface level. Sure, there are plenty of places that turn the disturbing up to 11 once you actually pay attention to the little details and/or backstory (e.g. Naxxramas, Scholomance) but the Crypt is mainly creepy because it has no explanation. Why the hell is this here? Not to mention the fact that everything there is fully functional and has its own sound effects. (There's even a dull heartbeat in the background if you turn your ambient sound up.) You can even kill yourself in there if you're not careful.
Case and point: The Upside-Down Sinners. A bunch of bloodied corpses attached to meat hooks underwater, so they're essentially floating upside-down. Why?!