6 countries (other than Italy or US):

Germany: [Vampyr] [German Chainsaw Massacre]
Brasil: [Prédio Vazio] [Mangue Negro]
Mexico: [Satanic Hispanics]
Cuba: [Juan de los Muertos]
South Korea: [I Saw the Devil]
Poland: [The Third Part of the Night]
Norway: [Marerttet]

9 decades:
1930s, 1940s, 1950s, 1960s, 1970s, 1980s, 1990s, 2000s,

5 Zombie Films: [White Zombie] [Return of the Living Dead] [Juan de los Muertos] [Mangue Negro] [One Cut of the Dead]
3 cult or conspiracy horror films: [Apartment 7A] [Inferno] [Scanners] [Race with the Devil]
1 film from a Black director with a Black lead: [Def by Temptation] [Nanny]
1 film from a Mexican or Central American director: [Satanic Hispanics] [Juan de los Muertos]
1 Canadian film: [Rabid] [Scanners]
1 former Soviet state film (Armenia, Azerbaijan, Belarus, Estonia, Georgia, Kazakhstan, Kyrgyzstan, Latvia, Lithuania, Moldova, Russia, Tajikistan, Turkmenistan, Ukraine, and Uzbekistan): [The Third Part of the Night] (Poland counts, right?)
The most popular film from the 1940s that you haven't seen and can access: [Cat People]
2 Post Apocalyptic horror films: [Juan de los Muertos] [Arcadian]
1 Film with dreams or a dream as part of the plot [Marerttet] [Jacob's Ladder]
1 The animals are pissed at us film: [Underwater]
1 Silent film: [Vampyr]
4 based on Novels: [The Haunting] [Pet Sematary] [Pet Sematary] [the Mangler]
Any film from THIS list that you haven't seen: [Def by Temptation]
1 Ernesto Gastaldi written film: [Torso]
1 film from 1932: [White Zombie] [Vampyr]
[Wizard of Oz]
1 Tobe Hooper Film: [Poltergeist] [The Mangler]

*This list may change in the future