I gave it a shot, and I triumphed! I watched a lot of vampire movies!

Hooptober 11

QUICK EASY RULES:
There must be 31 horror films
11/6 countries
Australia: Little Monsters 
Austria: The Hands of Orlac
Canada: Rumours
France: Spirits of the Dead 
Germany: Luz
India: Aatma
Ireland: Let the Wrong One In
Italy: Torso
Japan: Evil of Dracula 
UK: Die! Die! My Darling!
USA: The Slumber Party Massacre

11/8 decades
1920s: The Hands of Orlac
1930s: Dracula
1940s: Son of Dracula 
1950s: I Married a Monster from Outer Space
1960s: Die! Die! My Darling!
1970s: Torso
1980s: The Slumber Party Massacre
1990s: The Sect
2000s: Aatma
2010s: Little Monsters
2020s: Let the Wrong One In

ALL of the films from a horror franchise with at least 4 entries (if there is a hard reboot, you can choose whichever has 4+ that you prefer): Universal’s Dracula series: Dracula, Daughter of Dracula, Son of Dracula, House of Frankenstein, House of Dracula, Abbott and Costello Meet Frankenstein 
1 film by Wes Craven: The People Under the Stairs 
1 film caused by/worsened by weather: House of Frankenstein 
1 film starring a Black woman: The Blackening 
1 Donald Sutherland film: Die! Die! My Darling!
3 films from New World Pictures: The Slumber Party Massacre, The Bees, Children of the Corn
2 Indian films: Aatma, Bandh Darwaza
4 Italian films: Spirits of the Dead, Torso, The Sect, Phenomena
2 Horror comedies: Let the Wrong One In, Little Monsters 
2 films made primarily or entirely in Texas: The Naked Witch, A Ghost Story
1 film that exists in at least 2 available cuts: Nightbreed (Director’s Cut)
1 Robert Wiene film: The Hands of Orlac
1 Michael Soavi film: The Sect
1 film from 2011: The Oregonian
1 film from 1984: Children of the Corn

And 1 Tobe Hooper Film (There must ALWAYS be a Hooper film): The Funhouse