I realize that this kinda defeats the point, but...

[Linux.Blue]

Don't feel so bad. I was a bit nervous in the sequel. Hearing the zombies and not wanting to proceed on.
What scared me the most; Doom 3. It took me a few breaks before I realized that I had nothing to fear before hand, being the demons were just coming out to kill us, lost souls popping out of the computer, this and that.