I was afraid of playing half-life as a kid(I watched cousin play it) then I grew out of my fear. I think AvP 2 can be scary at times, like when you go down a dark hall way and your flash goes out and then an alien jumps up infront of your face and you jump out of your seat.
HL2Sometimes it can get quite creepy, especially when you're in the sewsers on the cbrown towns map.Gah, and when a headcrab zombie suddenly appears..
2 words and one number: Left 4 Dead DAMN HUNTERS
Oh please, Hunters don't do anything but scream and knock you down. I rush in and shotgun them to the face before they can do anything.