Clock Tower... so simple... but I fell in terror when I was being chased by Bobby

hmm didn't expect this many comments...nice.

If you liked Clock Tower, you should play Haunting Ground.

I didn't play the sequel.  Is it even scarier? 

I wouldn't be able to stomach that.  I'm far too squeamish.

Haha, actually I thoroughly enjoyed boom blox bash party. In fact, I'd say this game has the best implementation of motion in any game...well, ever.

Of course that's just my opinion.

No mention of Fatal Frame series?...they dont know what scary is.

I'd put Fatal Frame right after Silent Hill and Siren.

Indeed Silent Hill and Siren are also scary and i'd put all three in the top 3 scariest game series.  But I just find Fatal Frame scariest cause all you have is a freakin camera! xD ...I'd feel a little more secure with some sort of weapon but a special camera wont do it for me.

The experience of horror games still doesn't come close to movies like Alien, Silence of the lambs and The shining. (neither do modern horror films unfortunately)

My wife still gets the creeps when she sees Anthony Hopkins on tv and just mentioning "Here's Johny" freaks her out. What video game has that kind of effect?

The power of a good horror movie is that you have no other control then to close your eyes, which doesn't help since your imagination and the sound keep going. You still want to know what happens against better judgement. In a video game you can go the other way, fight back, die and reload etc.

The scariest parts in Silent hill 2 for me were not the chases or things creeping in the dark but when the game asks you if you want to stick your hand through a hole to try to retrieve something. Hell no. But need to do it to continue. The scariest part in Siren for me was when you're playing the little girl who can't fight back and when you see one of the zombies closing in on your hiding spot in sight jack mode. Finding a way to cut off your own finger in Heavy rain is a very immersive sequence as well. Just imagining what would hurt less, pliers or a knife, yuck.