This is my 7th year with 3 full completes the past three times! (I've missed the bonus movies for the past 2 years, but still counting it) I roped my partner in this year so instead of me just making the list and then picking a few she would like, we made the list together and will both be participating!! I'm super stoked on that! Here's Cinemonster's year 10 list with all of the criteria.
QUICK EASY RULES:

There must be 31 films

6 countries

1. Host (UK)
2. The Ring (USA)
3. The Wailing (South Korea)
4. The Orphanage (Spain/Mexico)
5. Ringu (Japan)
6. Bloody Hell (Autralia)

8 decades

1. Vampyr (1930s)
2. Black Sabbath (1960s)
3. The Wicker Man (1970s)
4. Pumpkinhead (1980s)
5. I Still Know What You Did Last Summer (1990s)
6. Dracula 3000 (2000s)
7. Parasite (2010s)
8. Smile (2020s)

2 post apocalyptic or natural disaster related films

1. Doomsday
2. Volcano

1 film with Robert Englund

1. Wes Craven's New Nightmare

1 something is underground film

1. Tremors

3 Satan/Devil centered films

1. Devil
2. Angel Heart
3. As Above, So Below

1 Amicus film.

1. Tales from the Crypt

The worst Dracula film (by Letterboxd rating) that you haven't seen and can access.

1. Dracula 3000

1 LGBTQ+ connected film

1. A Nightmare on Elm Street Part 2: Freddy's Revenge

5 Films from De Palma, Wes Craven, Ken Russell, Hitchcock and/or Moorhead & Benson.

1. Wes Craven's New Nightmare (Wes Craven)
2. A Nightmare on Elm Street (Wes Craven)
3. The Endless (Aaron Moorhead & Justin Benson)
4. The Black Dahlia (Brian de Palma)
5. The Lair of the White Worm (Ken Russell)

2 Peter Cushing films

1. Tales from the Crypt
2. House of the Long Shadows

1 film based on a work of or invoking the name Bram Stoker

1. The Lair of the White Worm

1 film based on a Clive Barker story

1. Hellraiser

1 film that was released the year that you turned 10

1. I Still Know What You Did Last Summer (1998)

1 Mario Bava film.

1. Black Sabbath

1 film with an 'x' in the title

1. Jaxon X

And 1 Tobe Hooper Film (There must ALWAYS be a Hooper film)

1. The Texas Chainsaw Massacre Part 2

***FOR THOSE THAT LIKE TO DO EXTRA WORK: WATCH The Zodiac Killer and 10 Rillington Place. Like last year, there is a third film: Shaky Shivers.