Slasher movies are more gruesome and involve a stalking murderer.Many involve a lot of blood and many special effects to make the scenes believeable.
Possession movies are more suspenseful and have many scenes that make you jump. In these movies a person or object is possessed by an entity.
Movies that are based on a true storie are the scariest of all because out of all the scary scenes in the film you cant really be sure of what is exaggerated and what really happened.
