This is cinemonster's list. I have more films than required on prompts because I just like to have each film fulfill at least one prompt (other than decades).

Progress: 30/31

6 countries (other than Italy or US)
-Sweden (The Phantom Carriage)
-UK (Dead of Night & Night of the Eagle)
-Czechoslovakia (The Cremator & Morgiana)
-Russia (Mister Designer)<
-Germany (The German Chainsaw Massacre)
-Brazil, Peru (Anaconda)
-France (Brotherhood of the Wolf)
-Canada (Pontypool)
-Norway (Dead Snow)
-UAE (Djinn)
-South Korea (The Wailing)
-Chile ( The Wolf House)
-Guatemala (La Llorona)
-Taiwan (Incantation)
9 decades
-1920s: The Phantom Carriage (1921)
-1930s: The Wizard of Oz (1930), The Old Dark House (1932)
-1940s: I Walked With a Zombie (1943), Dead of Night (1945)
-1960s: Night of the Eagle (1962), The Last Man on Earth (1964), The Cremator (1969)
-1970s: All the Colors of the Dark (1972), Morgiana (1972), Dead of Night (1974)
-1980s: Videodrome (1983), Mister Designer (1987)
-1990s: The Juniper Tree (1990), The German Chainsaw Massacre (1990), Anaconda (1997), Eve's Bayou (1997)
-2000s: Brotherhood of the Wolf (2001), Pontypool (2008), Dead Snow (2009), Pandorum (2009)
-2010s: Djinn (2013), Starry Eyes (2014), The Wailing (2016), Mandy (2018), The Wolf House (2018), La Llorona (2019)
-2020s: Candyman (2021), Incantation (2022), Nosferatu (2024), Frankenstein (2025)
5 Zombie Films
-I Walked With a Zombie
-Dead of Night
-Pontypool
-Dead Snow
-The Wailing
3 cult or conspiracy horror films
-Videodrome
-Starry Eyes
-Mandy
-Incantation
1 film from a Black director with a Black lead
-Eve's Bayou
-Candyman
1 film from a Mexican or Central American director
-La Llorona
-Frankenstein
1 Canadian film
-Pontypool
1 former Soviet state film
-Mister Designer (Russia)
-The Cremator & Morgiana (Czechoslovakia, which wasn't technically Soviet but a satellite state)
The most popular film from the 1940s that you haven't seen
-I Walked With a Zombie (1943)
-Dead of Night (1945)
2 Post Apocalyptic horror films
-The Last Man on Earth
-Pandorum
1 Film with dreams or a dream as part of the plot
-All the Colors of the Night
-Dead of Night
1 The animals are pissed at us film
-Anaconda
1 Silent film
-The Phantom Carriage
4 based on Novels
-The Old Dark House (Benighted by JB Priestley)
-Night of the Eagle (Conjure Wife by Fritz Leiber)
-The Last Man on Earth (I Am Legend by Richard Matheson)
-Mister Designer (short story The Gray Automobile by Alexander Grin)
-Candyman (short story The Forbidden by Clive Barker)
-Nosferatu (Dracula by Bram Stoker)
-Frankenstein (Frankenstein by Mary Shelley)
Any film from THIS list that you haven't seen
-Eve's Bayou
1 Ernesto Gastaldi written film
-All of the Colors of the Dark
1 film from 1932
-The Old Dark House
The Wizard of Oz (1939)
1 Tobe Hooper Film
-Djinn
Extra credit
Burn Witch Burn
German Chainsaw Massacre
Trick or Treat (1986).