Lets give it a try!

There must be 31 horror films
6 countries (other than Italy or US)
9 decades

5 Zombie Films
3 cult or conspiracy horror films
1 film from a Black director with a Black lead
1 film from a Mexican or Central American director
1 Canadian film
1 former Soviet state film (Armenia, Azerbaijan, Belarus, Estonia, Georgia, Kazakhstan, Kyrgyzstan, Latvia, Lithuania, Moldova, Russia, Tajikistan, Turkmenistan, Ukraine, and Uzbekistan)
The most popular film from the 1940s that you haven't seen and can access..
2 Post Apocalyptic horror films
1 Film with dreams or a dream as part of the plot
1 The animals are pissed at us film
1 Silent film
4 based on Novels
Any film from boxd.it/dQWe that you haven't seen.
1 Ernesto Gastaldi written film
1 film from 1932
I have never made a specific film a part of this before, but WIZARD of OZ ('39)

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

***FOR THOSE THAT LIKE TO DO EXTRA WORK: WATCH Burn Witch Burn, German Chainsaw Massacre & Trick or Treat (1986).