To determine the worst horror films of all time, 24/7 Wall St. created an index based on each film’s Rotten Tomatoes’ average critic rating, Rotten Tomatoes’ average audience rating, and Internet Movie Database’s average user rating. To be considered, each film needed to have at least 1,000 Rotten Tomatoes user ratings, 10 approved tomatometer critic reviews, and 1,000 IMDb user ratings.
We averaged the user ratings from Rotten Tomatoes and IMDb and weighted by the number of votes for each. The combined user rating was then averaged with the Rotten Tomatoes critic rating. The year the movie was released and the actors and actresses starring in each film came from IMDb.