Most of the flicks on this list have a few well-performing entries under their belt, but for The Blair Witch Project, it's riding to a spot on the strength of just one. The 1999 film, marketed as a pseudo-documentary used one of the most effective strategies of all time and raked in just under $250 million in theaters - an incredible showing for a horror movie starring no-name actors. The sequel certainly didn't perform up to the expectations of the original, but it still added enough cash to the pile to get it on the list. The filmmakers are still busily working away in Hollywood trying to get a third film made.