The main list to address all criteria contains all films that I've never seen before. Won't necessarily adhere to that for any supplemental add-ons (e.g., Psycho to make that my franchise for this year) or writing assignments.

Per the rules:
There must be (at least) 31 films
6 countries
8 decades
2 insect centered films
1 horror film set in space or the future (relative to when it was released)
2 animated films
1 bloodthirsty old person/people film
2 1970s regional US films (Thanks Sean Young)
The worst horror sequel from the 1990s that you haven't seen and can access. (I realize that this will take a little work)
1 German Silent
5 Films from David Cronenberg, Ti West, Bill Rebane, Charles B. Pierce, William Grefe and/or Joy N. Houck Jr.
2 Christopher Lee films
1 film with a musician or band in it (A real life musician or band)
1 Stephen King adaptation that is not the first go around
1 Lon Chaney film
1 Tobe Hooper film

6 Countries
̶T̶h̶e̶ ̶C̶a̶b̶i̶n̶e̶t̶ ̶o̶f̶ ̶D̶r̶.̶ ̶C̶a̶l̶i̶g̶a̶r̶i̶ (̶1̶9̶2̶0̶)̶ (̶G̶e̶r̶m̶a̶n̶y̶)̶
P̶h̶e̶n̶o̶m̶e̶n̶a̶ (̶I̶t̶a̶l̶y̶)̶
R̶a̶b̶i̶d̶ (̶1̶9̶7̶7̶)̶ (̶C̶a̶n̶a̶d̶a̶)̶
T̶u̶m̶b̶b̶a̶d̶ ̶(̶I̶n̶d̶i̶a̶)̶
V̶a̶m̶p̶i̶r̶e̶ ̶H̶u̶n̶t̶e̶r̶ ̶D̶ (̶J̶a̶p̶a̶n̶)̶
T̶h̶e̶ ̶W̶i̶c̶k̶e̶r̶ ̶M̶a̶n̶ (̶1̶9̶7̶3̶)̶ ̶(̶U̶n̶i̶t̶e̶d̶ ̶K̶i̶n̶g̶d̶o̶m̶)̶

8 Decades
T̶h̶e̶ ̶C̶a̶b̶i̶n̶e̶t̶ ̶o̶f̶ ̶D̶r̶.̶ ̶C̶a̶l̶i̶g̶a̶r̶i̶ (̶1̶9̶2̶0̶)̶ ̶(̶1̶9̶2̶0̶s̶)̶
P̶l̶a̶n̶e̶t̶ ̶o̶f̶ ̶t̶h̶e̶ ̶V̶a̶m̶p̶i̶r̶e̶s̶ (̶1̶9̶6̶0̶s̶)̶
T̶h̶e̶ ̶T̶o̶w̶n̶ ̶T̶h̶a̶t̶ ̶D̶r̶e̶a̶d̶e̶d̶ ̶S̶u̶n̶d̶o̶w̶n̶ (̶1̶9̶7̶6̶)̶ (̶1̶9̶7̶0̶s̶)̶
B̶l̶o̶o̶d̶ ̶H̶a̶r̶v̶e̶s̶t̶ (̶1̶9̶8̶7̶)̶ (̶1̶9̶8̶0̶s̶)̶
T̶h̶e̶ ̶B̶i̶r̶d̶s̶ ̶I̶I̶:̶ ̶L̶a̶n̶d̶'̶s̶ ̶E̶n̶d̶ (̶1̶9̶9̶0̶s̶)̶
S̶a̶l̶e̶m̶'̶s̶ ̶L̶o̶t̶ (̶2̶0̶0̶4̶)̶ (̶2̶0̶0̶0̶s̶)̶
T̶r̶i̶c̶k̶ (̶2̶0̶1̶9̶)̶ (̶2̶0̶1̶0̶s̶)̶
T̶h̶e̶ ̶S̶p̶i̶n̶e̶ ̶o̶f̶ ̶N̶i̶g̶h̶t̶ (̶2̶0̶2̶0̶s̶)̶

2 Insect-Centered Films
T̶h̶e̶ ̶N̶e̶s̶t̶ (̶1̶9̶8̶8̶)̶
P̶h̶e̶n̶o̶m̶e̶n̶a̶ ̶

1 Horror Film Set in Space or the Future (Relative to When it Was Released)
P̶l̶a̶n̶e̶t̶ ̶o̶f̶ ̶t̶h̶e̶ ̶V̶a̶m̶p̶i̶r̶e̶s̶

2 Animated Films
T̶h̶e̶ ̶S̶p̶i̶n̶e̶ ̶o̶f̶ ̶N̶i̶g̶h̶t̶
V̶a̶m̶p̶i̶r̶e̶ ̶H̶u̶n̶t̶e̶r̶ ̶D̶

1 Bloodthirsty Old Person / People Film
H̶a̶l̶l̶o̶w̶e̶e̶n̶ ̶E̶n̶d̶s̶

2 1970s Regional U.S. Films
C̶r̶e̶a̶t̶u̶r̶e̶ ̶f̶r̶o̶m̶ ̶B̶l̶a̶c̶k̶ ̶L̶a̶k̶e̶
T̶h̶e̶ ̶T̶o̶w̶n̶ ̶T̶h̶a̶t̶ ̶D̶r̶e̶a̶d̶e̶d̶ ̶S̶u̶n̶d̶o̶w̶n̶ (̶1̶9̶7̶6̶)̶

The Worst Horror Sequel from the 1990s That You Can Find and Access
T̶h̶e̶ ̶B̶i̶r̶d̶s̶ ̶I̶I̶:̶ ̶L̶a̶n̶d̶'̶s̶ ̶E̶n̶d̶

1 German Silent
T̶h̶e̶ ̶C̶a̶b̶i̶n̶e̶t̶ ̶o̶f̶ ̶D̶r̶.̶ ̶C̶a̶l̶i̶g̶a̶r̶i̶ (̶1̶9̶2̶0̶)̶

5 Films from David Cronenberg, Ti West, Bill Rebane, Charles B. Pierce, William Grefe and / or Joy N. Houck, Jr.
B̶l̶o̶o̶d̶ ̶H̶a̶r̶v̶e̶s̶t̶ (̶1̶9̶8̶7̶)̶ ̶(̶B̶i̶l̶l̶ ̶R̶e̶b̶a̶n̶e̶)̶
C̶r̶e̶a̶t̶u̶r̶e̶ ̶f̶r̶o̶m̶ ̶B̶l̶a̶c̶k̶ ̶L̶a̶k̶e̶ ̶(̶J̶o̶y̶ ̶N̶.̶ ̶H̶o̶u̶c̶k̶,̶ ̶J̶r̶.̶)̶
P̶e̶a̶r̶l̶ (̶2̶0̶2̶2̶)̶ (̶T̶i̶ ̶W̶e̶s̶t̶)̶
R̶a̶b̶i̶d̶ (̶1̶9̶7̶7̶)̶ D̶a̶v̶i̶d̶ ̶C̶r̶o̶n̶e̶n̶b̶e̶r̶g̶
T̶h̶e̶ ̶T̶o̶w̶n̶ ̶T̶h̶a̶t̶ ̶D̶r̶e̶a̶d̶e̶d̶ ̶S̶u̶n̶d̶o̶w̶n̶ (̶1̶9̶7̶6̶)̶ (̶C̶h̶a̶r̶l̶e̶s̶ ̶B̶.̶ ̶P̶i̶e̶r̶c̶e̶)̶

2 Christopher Lee Films
H̶o̶r̶r̶o̶r̶ ̶E̶x̶p̶r̶e̶s̶s̶ (̶1̶9̶7̶2̶)̶
T̶h̶e̶ ̶W̶i̶c̶k̶e̶r̶ ̶M̶a̶n̶ (̶1̶9̶7̶3̶)̶

1 Film with a Real-Life Musician or Band in It
T̶r̶i̶c̶k̶ ̶o̶r̶ ̶T̶r̶e̶a̶t̶ (̶1̶9̶8̶6̶)̶

1 Stephen King Adaptation That is Not the First Go-Around
S̶a̶l̶e̶m̶'̶s̶ ̶L̶o̶t̶ (̶2̶0̶0̶4̶)̶

1 Lon Chaney Film
T̶h̶e̶ ̶P̶e̶n̶a̶l̶t̶y̶ (̶1̶9̶2̶0̶)̶

1 Tobe Hooper Film
B̶o̶d̶y̶ ̶B̶a̶g̶s̶

Others to Fill Out the Total to 31 (Or More)
B̶a̶r̶b̶a̶r̶i̶a̶n̶
B̶o̶d̶i̶e̶s̶ ̶B̶o̶d̶i̶e̶s̶ ̶B̶o̶d̶i̶e̶s̶
D̶e̶a̶d̶s̶t̶r̶e̶a̶m̶
D̶r̶.̶ ̶G̶i̶g̶g̶l̶e̶s̶
A̶ ̶N̶i̶g̶h̶t̶m̶a̶r̶e̶ ̶o̶n̶ ̶E̶l̶m̶ ̶S̶t̶r̶e̶e̶t̶ (̶1̶9̶8̶4̶)̶
A̶ ̶N̶i̶g̶h̶t̶m̶a̶r̶e̶ ̶o̶n̶ ̶E̶l̶m̶ ̶S̶t̶r̶e̶e̶t̶ ̶3̶:̶ ̶D̶r̶e̶a̶m̶ ̶W̶a̶r̶r̶i̶o̶r̶s̶
A̶ ̶N̶i̶g̶h̶t̶m̶a̶r̶e̶ ̶o̶n̶ ̶E̶l̶m̶ ̶S̶t̶r̶e̶e̶t̶ ̶4̶:̶ ̶T̶h̶e̶ ̶D̶r̶e̶a̶m̶ ̶M̶a̶s̶t̶e̶r
A̶ ̶N̶i̶g̶h̶t̶m̶a̶r̶e̶ ̶o̶n̶ ̶E̶l̶m̶ ̶S̶t̶r̶e̶e̶t̶ ̶5̶:̶ ̶T̶h̶e̶ ̶D̶r̶e̶a̶m̶ ̶C̶h̶i̶l̶d̶
A̶ ̶N̶i̶g̶h̶t̶m̶a̶r̶e̶ ̶o̶n̶ ̶E̶l̶m̶ ̶S̶t̶r̶e̶e̶t̶ ̶(̶2̶0̶1̶0̶)̶
S̶m̶i̶l̶e̶ (̶2̶0̶2̶2̶)̶
T̶e̶r̶r̶i̶f̶i̶e̶r̶ ̶2̶
W̶e̶n̶d̶e̶l̶l̶ ̶&̶ ̶W̶i̶l̶d̶
W̶e̶r̶e̶w̶o̶l̶f̶ ̶b̶y̶ ̶N̶i̶g̶h̶t̶

HOOPTOBER 9 FILMS RANKED (only those previously unseen)

1. Tumbbad
2. Barbarian (2022)
3. The Wicker Man (1973)
4. The Cabinet of Dr. Caligari (1920)
5. Halloween Kills
6. The Penalty (1920)
7. Horror Express (1972)
8. Smile (2022)
9. Trick (2019)
10. The Nest (1988)
11. Werewolf by Night
12. Deadstream
13. Phenomena
14. Terrifier 2
15. Salem's Lot (2004)
16. Body Bags
17. Rabid (1977)
18. Planet of the Vampires
19. The Town That Dreaded Sundown (1976)
20. Vampire Hunter D
21. Wendell & Wild
22. The Birds II: Land's End
23. Dr. Giggles
24. Blood Harvest (1987)
25. Trick or Treat (1986)
26. Pearl (2022)
27. The Spine of Night
28. Bodies Bodies Bodies
29. Creature from Black Lake
30. A Nightmare on Elm Street (2010)