You're exploring a massive epic cave. So far you've collected two stacks of iron ore, a stack of gold ore, a music disc, some lapis, enough redstone to wire a minecraft mansion, and even a few diamonds. However, your torches are running low. Your hunger meter is down to three drumsticks. It's time to leave. You're about to dig your way up to the surface when you hear an all-too familiar hiss. Then...BOOM!
The blast sends you flying into a nearby lava pool. The red-hot goo kills you in seconds, destroying your hard-earned treasures. You respawn in your house, with nothing but the default clothes on your back.
Olga from Shadow Hearts I and fucking Gigyas from the Earthbound series.
I was traumatized when I saw the form of Gigyas when I was little so don- *sniff* blame me Also, Olga is a creepy looking young women who makes bathrooms creepy. OH ERMAGURD, pass through the mirrors, hear the stalls creaking, a-a- *shivers*
So far, the creepiest game character I've encountered was The End from Metal Gear Solid 3: Snake Eater.
Factors for creepiness:
1. He's a top-notch sniper. Enough said there. 2. His camouflage and ability to lower his body temperature, which makes it difficult to spot him with the naked eye or thermal goggles. 3. The place where you fight him: Sokrovenno Forest. Big, lots of places for him to hide, and just as noisy as a graveyard, meaning frighteningly silent. 4. Trying to look for him in first-person view: The directional microphone is one of the only effective tools for determining his location, but if you remain in first-person view for too long, there's a chance he might sneak up behind you. 5. Trying to get Snake out of sight once spotted: I'm always like "OH, SH**! DA** IT, RUN! GET OUT OF THERE, SNAKE!" With not a clue as to where The End is shooting from, it's hard to find a place to dive for cover, and sometimes the game camera will move to The End's perspective, looking through the crosshairs of his scope, which makes it more difficult to move Snake around.
Little sisters from bioshock freak me out, but the annoying voice acting tends to ruin the affect after a while. Death from Pirate Adventures wasn't a even villain, but damn was he freaky! He had worms and maggots coming out of his face and everything.
Grunts from Halo. i don't know why, but the freak me out immensely- like chills down the back, pause the game, I'm done creepy. It's like they're so ugly it's scary.
It's weird because I've played all kinds of scary games, (silent hill, RE, the suffering, Fatal Frame, Siren), along with a bunch of other games, many of them mentioned but I get punked by a squeaky voiced alien.
Not characters, but I might as well mention them since they scare the living crap out of me:
Those thorn/plant things from Wind Waker. They terrified me back then, they still terrify me now. That texture, that movement, those sounds...ERGGHH! -shudders- (worst part is that's pretty much the only thing that scares me in Wind Waker. Floormasters? Nope. Redeads? Ehhh, a little. Thorns? NO NO NO NO ABANDON GAME, ABANDON GAME.)
Frostbite Spiders from Skyrim. I don't have arachnophobia but damn! Those are the creepiest spiders that I've ever seen in any video game. The worst part is that they can appear anywhere. ANYWHERE. (bad memories of Ustengrav after the red rocks puzzle)
Basically, I have a fear for natural things that wiggle and move and make squelchy noises.
Does it have to be a character with dialogue and story significance?
If not, then the Wallmasters in Ocarina of Time. I remember when I first played the game when I was seven or so. I went through the Forest Temple as if it were any other dungeon, and all was well... until, all of a sudden, a freaking monster hand dropped from the ceiling and forcibly dragged Link off into the nether.
the Spider from Limbo was goddamn creepy, especially since the game had already drawn you in by that point and it does its job really really well. Another one for me would actually be SHODAN from System Shock 2. Her seemingly strong omniscience and processor-heart coldness together with the games strong focus on atmosphere and her character alltogether, that sentient AI chilled me to the damn bones.
Harvest moon 64: the end of winter, you have a child with karen and take it to the sprites house in the mountain. walk to the one sprite in the corner, You get a text dialog box of an old ass creepy man that just giggles at it. why? we will never know. WORST EASTER EGG EVER.