The scariest movie of all time is.

[Evol]

freddy krueger, the original one.

[dan_cov]

Not scary but I just watched Daddy's little girl.

Original, really well written, the special effects are awesome but I warn you its not for those that are screamish.
Starts a little slow but stick with it.

[PAC-BOY]

Its Alive

[Ruthless One]

For me:

The Ring
Mothman Prophecies
Event Horizon
Stay Alive

[Double_L]

This movie used to freak me out as a child:

[Chiboxing123]

I really need to watch deliver us from evil. I have the copy just haven't pressed play yet lol