How popular horror movies were originally supposed to end
'Evil Dead' (2013)

In this gory horror movie, the protagonist must literally kill the demonic version of herself to survive.
'The Butterfly Effect' (2004)

The movie follows Evan (Ashton Kutcher) as he rewrites his own life story over and over.
'World War Z' (2013)

In the ending most people see, Gerry Lane (Brad Pitt) makes it to the World Health Organization to develop a substance that allows humans to be invisible to zombies. It ends with him rejoining his family.

An alternative ending involves him discovering that the cold can kill zombies, and then learning that his wife is living in Florida after trading her body to a soldier in exchange for survival.
'Hostel' (2005)

A group of friends are kidnapped and imprisoned in a room where various men take turns torturing them. In the end, one of the friends (named Paxton) escapes, hunts down the kidnapper, and kills him.
'Alien' saga

The famous heroine, Ellen Ripley, was not supposed to survive the first movie in the saga.
'The Descent' (2005)

The movie—about a group of female spelunkers who get stuck in a cave and are systematically killed by blood-thirsty cave dwellers—ends with one of the women escaping.
'Get Out' (2017)

One of the most intense movies of the year and Oscar Award for Best Picture nominee 'Get Out' ends with Chris escaping the house he is being imprisoned in. In a desperate attempt to break free he strangles his girlfriend just as his buddy pulls up in a cop car.

In the original ending, a real police officer was supposed to show up, arrest Chris, and lock him in jail, where he is unable to convince anyone of what really happened.
'Leatherface' (2017)

In the prequel to 'The Texas Chainsaw Massacre,' the movie ends with Leatherface catching a woman and killing her.
'Godsend' (2004)

When a couple loses their eight-year-old son, a scientist offers to clone him. The clone starts having night terrors about the original version of himself that end up becoming reality. The movie ends with him shown in a possessed state.
'The Blair Witch Project' (1999)

The actual ending is already pretty depressing: everyone dies. Audiences are left wondering what exactly happened and whether or not they were killed by the witch.
'Paranormal Activity' saga

The movies apparently had dozens of alternative endings.
'1408' (2007)

John Cusack plays Mike Enslin, who loses his daughter and copes with his grief by traveling to allegedly haunted hotel rooms to prove they're hoaxes. At one point, he comes face to face with a terrifying spirit and sets the hotel room on fire to escape. He ends up surviving.
'Happy Death Day' (2017)

A woman is forced to continue reliving the day in which she is murdered until she can solve the murder and stay alive.
The original ending involved her solving the murder and thinking she had survived—only to be killed one last time before the credits start rolling.