It's one thing to make a successful horror movie, but it's an exceptionally rarer achievement to make a sequel that is as scarily effective as the original. With "Paranormal Activity 4" and "Silent Hill 2" soon hitting theaters, we thought it was a good idea to come up with ten of our favorite freaky follow-ups that equal -- or even surpass -- the originals, from slashers and psychos to aliens and zombies. 

Do you agree or disagree with our choices? What did we miss? Sound off in the comments section.