(With apologies to Sergei Eisenstein)

COMPLETE

All first-time watches for 2021, maybe seen sections on cable, but never start-to-finish.

QUICK EASY RULES:

8 decades:
Haxan (‘22)
La Main du Diable (‘43)
The Curse of Frankenstein (‘57)
Kuroneko (‘68)
The Brood (‘79)
The House By the Cemetary (‘81)
Event Horizon (‘97)
Tigers Are Not Afraid ('17)

6 countries:
Haxan (Sweden)
La Main du Diable (France)
The Curse of Frankenstein (UK)
Kuroneko (Japan)
The Brood (Canada)
The House By the Cemetary (Italy)

2 folk horror:
Witchfinder General
Kuroneko

4 films from 1981:
Kisapmata
Possession (can anyone please help me see this?)
The House By the Cemetary
Roadgames 

2 films from your birth year:
Witchfinder General (’68)
Kuroneko (‘68)

2 haunted house films:
The House By the Cemetary
Demons 2

The worst Part 2 that you haven't seen and can access:
Jurassic Shark

1 film set in the woods:
Kuroneko

1 Kaiju or Kong film:
Destroy All Monsters

2 Hammer films:
The Curse of Frankenstein
Dracula Has Risen From The Grave

3 films with a person of color as director or lead (excluding Asian):
Tigers Are Not Afraid
Event Horizon
Good Manners

3 Asian horror films:
Kuroneko
Kisapmata
Destroy All Monsters

And 1 Tobe Hooper Films (There must ALWAYS be a Hooper film): 
Body Bags

Currently have satisfied the criteria of the challenge with 18 titles. Here are 13 more to make 31 days of horror! See below

***FOR THOSE THAT LIKE TO DO EXTRA WORK:
JD's Revenge, The Skull and The Scooby Doo Project

If I have my way, if at all possible, I will see TITANE in Hoopto8er even if I have to drive 2 hours to do it.