What was your biggest “holy shit!” moment while playing a video game?

Tales of Symphonia, when the Governor of Palmacosta's young daughter turns out to be an impostor, and that his real daughter has most likely been dead for quite a while. That, and when Presea's been out of it so long, she doesn't realize her father's corpse is still in bed. Lots of fucked up moments, but it's still the best Tales game I've played.
— GinAndJellyfish

The first time I killed the Lich King with my guild. We were doing so good, we had him at 10% health, and then boom, we're all dead. Then the Lich King starts gloating about how luring us here and murdering us was his plan the whole time, and he was going to raise us all as undead minions to help him destroy the world. We're completely powerless to stop it, and it was only by actual divine intervention that we were rescued. I'd never had a boss fight do such a 180 from "you're winning!" to "lol you're fucked, scripted story time!" before, and it legitimately surprised and rattled me.
— LadyFoxfire

If anyone wants to play Dishonored for real and hasn't yet. Don't read this. Spoils one of the best moments in the game. In Dishonored, you've got to defeat this assassin in combat to get to the end of a particularly knarly level in the game. Problem is, he's surrounded by his minions, (and I did not know that if you haven't killed that many people up to that point he'll call them off and fight you solo). So I've got to figure out some way to get him away from all his buddies... I've got it! I'll use my "Possession" power, take control of him, and walk him somewhere nice and isolated so I can choke him out. That'll work. I jump into his mind, walk him around for a few seconds. Then I hear "Nice try, Corvo... But the inside of my mind is the last place you want to be". I get forcibly kicked out of his head, and suddenly, the fight is on. Holy shit, right? All right, well, I beat him. Next time I'm playing through the game, I have not been careful to kill only a few people, so he's gonna get all his friends to jump me right at the start of the fight. Posession doesn't work... I know! I'll use "Bend Time" to attack him solo while he's frozen! So I use Bend Time, and jump down to attack him while his buddies are frozen. I realized mid-jump that HE'S STILL MOVING. He's not affected by Bend Time, either! "Nice try, Corvo", he taunts, and it's on. As soon as my Bend Time stops, his buddies jump me. Yeah, the Daud fight is golden.
— Spudrockets

The first BioShock, at the halfway point or something, when the corpses are normal, dead bodies, but when you go through a room of them and then backtrack, all the "corpses" jump up and attack you. Freaked me out, man.
— PartTimePoster

Dark Souls. Taking the elevator down from the church and realizing you're back at firelink shrine
— attorneyriffic

Two parts in Journey. 1. The end part of the sand surfing section. 2. The last section of the game. Both are beautiful and amazing.
— Semicolon7645

Entering Andrew Ryan office in Bioshock, everything about that scene is perfect, from the music to the voice acting. Up to this day I can't see the cutscene without shivering.
— Tecnocazuela

Top 10 Answers