Boo
There must be 31 horror films

6 countries (other than Italy or US)
Bring Her Back (Australia)
Audition (Japan)
The Wicker Man (UK)
Train to Busan (South Korea)
When Evil Lurks (Argentina)
The Devil's Backbone (Mexico)

9 decades
Nosferatu (1922)
Vampyr (1932)
Blood and Black Lace (1964)
Black Christmas (1974)
Hellraiser (1987)
Audition (1999)
Lake Mungo (2008)
Raw (2016)
Bring Her Back (2025)

5 Zombie Films
Night of the Living Dead
Train To Busan
The Evil Dead
Evil Dead
World War Z

3 cult or conspiracy horror films
The Wicker Man
Scanners
Opus

1 film from a Black director with a Black lead
Get Out

1 film from a Mexican or Central American director
The Devil's Backbone (Guillermo del Toro)

1 Canadian film
The Fly (David Cronenberg)

1 Russian or former Russian state film
Viy

The most popular film from the 1940s that you haven't seen and can access..
Cat People

2 Post Apocalyptic horror films
World War Z
It Comes at Night

1 Film with dreams or a dream as part of the plot
Mulholland Drive

1 The animals are pissed at us film
The Shallows

1 Silent film
Nosferatu (1922)

4 based on Novels
Audition
Hellraiser
The Wicker Man
Nosferatu

Any film from THIS list that you haven't seen.
Black Christmas

1 Ernesto Gastaldi written film
All the Colors of the Dark

1 film from 1932
Vampyr 

I have never made a specific film a part of this before, but WIZARD of OZ ('39)
The Wizard of Oz

And 1 Tobe Hooper Film (There must ALWAYS be a Hooper film)
Poltergeist