After two years of dedication to a random yet consistent Spooktober and after having successfully completed my first Hooptober, here's my second attempt to the notorious challenge.
I managed to complete all the tasks with 22 movies only, the remaining 9 were added as extras at the end of the list, according to my own taste.
Personal extra task for this year: all 31 movies must be a first-time watch

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31 movies

6 countries (other than Italy or US) (+ 5): Sweden, UK, Canada, Russia, Japan, Mexico + Canada-USA-France, UK-USA, Italy-Spain, Belgium-UK-USA, South Africa-UK-USA, USA-Germany, Iceland-Poland-Sweden

9 decades (+1)
1920s The Phantom Carriage
1930s Frankenstein, The Mummy, The Wizard of Oz
1940s The Wolf Man
1960s The Innocents, Viy, Night of the Living Dead
1970s The Strange Vice of Mrs Wardh, The Toolbox Murders
1980s A Nightmare on Elm Street Part 2: Freddy’s Revenge, Day of the Dead, Re-Animator, A Nightmare on Elm Street Part 3: Dream Warriors
1990s Cronos, The Dark Half, In the Mouth of Madness, The Mangler, The Faculty
2000s Bones, Jeepers Creepers, Dreamcatcher, Land of the Dead
2010s Backcountry, One Cut of the Dead, Mandy, Halloween, Zombieland: Doubletap
+ 2020s: Broadcast Signal Intrusion, Lamb

5 Zombie Films (Night of the Living Dead, Day of the Dead, Land of the Dead, One Cut of the Dead, Zombieland: Doubletap)
3 cult or conspiracy horror films (In the Mouth of Madness, Mandy, Broadcast Signal Intrusion)
1 film from a Black director with a Black lead (Sinners)
1 film from a Mexican or Central American director (Cronos)
1 Canadian film (Backcountry + In a Violent Nature)
1 former Soviet state film (Viy)
The most popular film from the 1940s that you haven't seen and can access (The Wolf Man)
2 Post Apocalyptic horror films (Day of the Dead, Land of the Dead+ Night of the Living Dead, Zombieland: Double Tap)
1 Film with dreams or a dream as part of the plot (A Nightmare on Elm Street Part 2: Freddy’s Revenge+A Nightmare on Elm Street Part 3: Dream Warriors)
1 The animals are pissed at us film (Backcountry)
1 Silent film (The Phantom Carriage)
4 films based on Novels (The Innocents, Viy, The Dark Half, Dreamcatcher + The Mangler)
Any film from THIS list that you haven't seen (The Phantom Carriage+The Mummy, The Wolf Man. One Cut of the Dead)
1 Ernesto Gastaldi written film (The Strange Vice of Mrs Wardh)
1 film from 1932 (The Mummy)
The Wizard of Oz (The Wizard of Oz, no shit)
And 1 Tobe Hooper Film (The Mangler)