ILLUSION - Ghost Killer : The goal is to position six cameras in a shed, where people report hearing scary things, and hear a strange laugh!
Very low-tech, but extremely effective. Though this is another entry in the genre of "Find/do X things and avoid the scary guy" started by Slender, there's something about Jeff the Killer that is just scarier than the Slenderman. I guess it's the laugh and that *face*. Anyway, for a free fright, you can't go wrong with this one.