Which of these films is not based on a true story?

Shot with shaky, handheld cameras, the documentary-style movie told the story of three student filmmakers who disappeared into the woods and were never heard from again, although their footage was later discovered. With the help of a Web-based viral marketing strategy—a relatively new concept at the time—The Blair Witch Project generated huge buzz over the question of whether or not it was based on a true story. In fact, the story was entirely fake.

Source: History