The 1980 slasher movie Friday the 13th introduced horror fans to iconic villain Jason Voorhees with his hockey mask and childhood trauma. While the 1980 film has long been considered some of the most popular slashers, not all the 12 films in the franchise are universally beloved. Every fan has their own opinion of which movies were necessary and which didn't need to be made. One thing is certain, though: Friday the 13th is a horror franchise with deep lore.