The main list contains all films that I've never seen before. Won't necessarily adhere to that for any supplemental add-ons.

Per the rules:

6 Countries
C̶o̶r̶p̶s̶e̶ ̶M̶a̶n̶i̶a̶ (̶C̶h̶i̶n̶a̶)̶
K̶u̶r̶o̶n̶e̶k̶o̶ (̶J̶a̶p̶a̶n̶)̶
M̶y̶ ̶B̶l̶o̶o̶d̶y̶ ̶V̶a̶l̶e̶n̶t̶i̶n̶e̶ (̶1̶9̶8̶1̶)̶ (̶C̶a̶n̶a̶d̶a̶)̶
S̶c̶a̶r̶s̶ ̶o̶f̶ ̶D̶r̶a̶c̶u̶l̶a̶ (̶U̶n̶i̶t̶e̶d̶ ̶K̶i̶n̶g̶d̶o̶m̶)̶
A̶ ̶T̶a̶l̶e̶ ̶o̶f̶ ̶T̶w̶o̶ ̶S̶i̶s̶t̶e̶r̶s̶ (̶S̶o̶u̶t̶h̶ ̶K̶o̶r̶e̶a̶)̶
Z̶o̶m̶b̶i̶e̶ ̶F̶l̶e̶s̶h̶ ̶E̶a̶t̶e̶r̶s̶ (̶I̶t̶a̶l̶y̶)̶

8 Decades
T̶h̶e̶ ̶U̶n̶i̶n̶v̶i̶t̶e̶d̶(̶1̶9̶4̶0̶s̶)̶
K̶u̶r̶o̶n̶e̶k̶o̶ (̶1̶9̶6̶0̶s̶)̶
Z̶o̶m̶b̶i̶e̶ ̶F̶l̶e̶s̶h̶ ̶E̶a̶t̶e̶r̶s̶ (̶1̶9̶7̶0̶s̶)̶
T̶h̶e̶ ̶B̶u̶r̶n̶i̶n̶g̶ (̶1̶9̶8̶0̶s̶)̶
G̶a̶m̶e̶r̶a̶:̶ ̶G̶u̶a̶r̶d̶i̶a̶n̶ ̶o̶f̶ ̶t̶h̶e̶ ̶U̶n̶i̶v̶e̶r̶s̶e̶ (̶1̶9̶9̶0̶s̶)̶
A̶ ̶T̶a̶l̶e̶ ̶o̶f̶ ̶T̶w̶o̶ ̶S̶i̶s̶t̶e̶r̶s̶ (̶2̶0̶0̶0̶s̶)̶
B̶i̶r̶d̶e̶m̶i̶c̶:̶ ̶S̶h̶o̶c̶k̶ ̶a̶n̶d̶ ̶T̶e̶r̶r̶o̶r̶ (̶2̶0̶1̶0̶s̶)̶
N̶i̶g̶h̶t̶ ̶T̶e̶e̶t̶h̶ (̶2̶0̶2̶0̶s̶)̶

2 Folk Horror
F̶e̶a̶r̶ ̶S̶t̶r̶e̶e̶t̶ ̶1̶6̶6̶6̶
T̶h̶e̶ ̶S̶e̶r̶p̶e̶n̶t̶ ̶a̶n̶d̶ ̶t̶h̶e̶ ̶R̶a̶i̶n̶b̶o̶w̶

4 Films from 1981
T̶h̶e̶ ̶B̶u̶r̶n̶i̶n̶g̶
C̶o̶r̶p̶s̶e̶ ̶M̶a̶n̶i̶a̶
T̶h̶e̶ ̶F̶u̶n̶h̶o̶u̶s̶e̶
M̶y̶ ̶B̶l̶o̶o̶d̶y̶ ̶V̶a̶l̶e̶n̶t̶i̶n̶e̶ (̶1̶9̶8̶1̶)̶

2 Films from Your Birth Year (1979)
T̶o̶u̶r̶i̶s̶t̶ ̶T̶r̶a̶p̶
Z̶o̶m̶b̶i̶e̶ ̶F̶l̶e̶s̶h̶ ̶E̶a̶t̶e̶r̶s̶

2 Haunted House Films
A̶ ̶T̶a̶l̶e̶ ̶o̶f̶ ̶T̶w̶o̶ ̶S̶i̶s̶t̶e̶r̶s̶
T̶h̶e̶ ̶U̶n̶i̶n̶v̶i̶t̶e̶d̶

The Worst Part 2 You Haven't Seen and Can Access
B̶i̶r̶d̶e̶m̶i̶c̶ ̶2̶:̶ ̶T̶h̶e̶ ̶R̶e̶s̶u̶r̶r̶e̶c̶t̶i̶o̶n̶

1 Film Set in the Woods
T̶h̶e̶ ̶B̶u̶r̶n̶i̶n̶g̶

1 Kaiju or Kong Film (Not Godzilla vs. Kong)
G̶a̶m̶e̶r̶a̶:̶ ̶G̶u̶a̶r̶d̶i̶a̶n̶ ̶o̶f̶ ̶t̶h̶e̶ ̶U̶n̶i̶v̶e̶r̶s̶e̶

2 Hammer Films
Q̶u̶a̶t̶e̶r̶m̶a̶s̶s̶ ̶a̶n̶d̶ ̶t̶h̶e̶ ̶P̶i̶t̶
S̶c̶a̶r̶s̶ ̶o̶f̶ ̶D̶r̶a̶c̶u̶l̶a̶

3 Films with a Non-Asian Person of Color as the Director or Lead
C̶a̶n̶d̶y̶m̶a̶n̶ ̶(̶2̶0̶2̶1̶)̶
F̶e̶a̶r̶ ̶S̶t̶r̶e̶e̶t̶:̶ ̶1̶9̶9̶4̶
N̶i̶g̶h̶t̶ ̶T̶e̶e̶t̶h̶

3 Asian Horror Films
C̶o̶r̶p̶s̶e̶ ̶M̶a̶n̶i̶a̶
K̶u̶r̶o̶n̶e̶k̶o̶
A̶ ̶T̶a̶l̶e̶ ̶o̶f̶ ̶T̶w̶o̶ ̶S̶i̶s̶t̶e̶r̶s̶

1 Tobe Hooper Film
T̶h̶e̶ ̶F̶u̶n̶h̶o̶u̶s̶e̶

Others to Fill Out the Total to 31 (Or More)
A̶n̶t̶l̶e̶r̶s̶
D̶e̶a̶t̶h̶d̶r̶e̶a̶m̶
F̶e̶a̶r̶ ̶S̶t̶r̶e̶e̶t̶ ̶1̶9̶7̶8̶
F̶r̶i̶d̶a̶y̶ ̶t̶h̶e̶ ̶1̶3̶t̶h̶ ̶P̶a̶r̶t̶ ̶V̶I̶I̶I̶:̶ ̶J̶a̶s̶o̶n̶ ̶T̶a̶k̶e̶s̶ ̶M̶a̶n̶h̶a̶t̶t̶a̶n̶
H̶a̶l̶l̶o̶w̶e̶e̶n̶ ̶(̶2̶0̶1̶8̶)̶
H̶a̶l̶l̶o̶w̶e̶e̶n̶ ̶K̶i̶l̶l̶s̶
H̶e̶l̶l̶g̶a̶t̶e̶
L̶a̶s̶t̶ ̶N̶i̶g̶h̶t̶ ̶i̶n̶ ̶S̶o̶h̶o̶
T̶h̶e̶ ̶L̶o̶s̶t̶ ̶B̶o̶y̶s̶
T̶h̶e̶ ̶M̶o̶n̶s̶t̶e̶r̶ ̶S̶q̶u̶a̶d̶
O̶l̶d̶
P̶a̶r̶a̶n̶o̶r̶m̶a̶l̶ ̶A̶c̶t̶i̶v̶i̶t̶y̶:̶ ̶N̶e̶x̶t̶ ̶o̶f̶ ̶K̶i̶n̶
P̶h̶a̶s̶e̶ ̶I̶V̶
T̶h̶e̶ ̶R̶e̶t̶u̶r̶n̶ ̶o̶f̶ ̶t̶h̶e̶ ̶L̶i̶v̶i̶n̶g̶ ̶D̶e̶a̶d̶
S̶a̶i̶n̶t̶ ̶M̶a̶u̶d̶
S̶e̶e̶d̶i̶n̶g̶ ̶o̶f̶ ̶a̶ ̶G̶h̶o̶s̶t̶
T̶h̶e̶ ̶S̶t̶u̶f̶f̶
V̶a̶m̶p̶
V̶a̶m̶p̶y̶r̶e̶s̶

3 Extra Credit
J̶.̶D̶.̶'̶s̶ ̶R̶e̶v̶e̶n̶g̶e̶
T̶h̶e̶ ̶S̶c̶o̶o̶b̶y̶-̶D̶o̶o̶ ̶P̶r̶o̶j̶e̶c̶t̶
T̶h̶e̶ ̶S̶k̶u̶l̶l̶

HOOPTOBER 8.0 FILMS RANKED (only those previously unseen)
1. Seeding of a Ghost
2. The Return of the Living Dead
3. Tourist Trap
4. Phase IV
5. The Uninvited (1944)
6. Candyman (2021)
7. Halloween Kills
8. Deathdream
9. Gamera: Guardian of the Universe
10. Kuroneko
11. The Funhouse
12. Zombie Flesh Eaters
13. A Tale of Two Sisters
14. Vampyres
15. The Skull
16. Old
17. Fear Street 1994
18. J.D.'s Revenge
19. Fear Street 1666
20. The Stuff
21. Saint Maud
22. Hellgate
23. My Bloody Valentine (1981)
24. The Burning
25. Birdemic: Shock and Terror
26. Paranormal Activity: Next of Kin
27. Antlers
28. Scars of Dracula
29. Quatermass and the Pit
30. Night Teeth
31. Fear Street 1978
32. The Serpent and the Rainbow
33. Vamp
34. Last Night in Soho
35. Corpse Mania
36. Birdemic 2: The Resurrection
37. The Scooby-Doo Project