The ending sequence of Metro 2033, the CoD 4 nuke, and most of amnesia. The part that got me the most was in that game was:
Was walking down a dark and scary corridor. I'll see what's behind this door. HOLY SHIT MONSTER!! SHUT THE DOOR! RUN RUN RUN!! Okay, I can hide here for a while. It's probably safe now. AHH HE'S STILL IN THERE!! Hide some more. OK, I can sneak past that door. Got what I need, just need to sneak back up. Please don't see me please don't see me please don't see me please don't see me. Okay, I'm far enough away, it should be safe to turn on my lantern now. SHIIIIT!!! IT'S RIGHT IN FRONT OF ME!!!!!