Original list by Cinemonster: letterboxd.com/cinemonster/list/hooptober-x-hooptober-hooptober-let-satan/

There must be 31 films
6 countries - Song at Midnight (China), Pulse (Japan), Saint Maud (UK), Rare Exports (Finland), Relic (Australia), El Conde (Chile)
8 decades - 1920's (The Lodger), 1930's (Song at Midnight), 1960's (Brides of Dracula), 1970's (Sisters), 1980's (The Company of Wolves), 1990's (Cronos), 2010's (Creep), 2020's (Nope)
2 post apocalyptic or natural disaster related films - Night of the Comet, The Girl with All the Gifts
1 film with Robert Englund - Urban Legend
1 something is underground film - As Above, So Below
3 Satan/Devil centered films - Devil, The Devil's Candy, The Devil's Doorway (This one was tough for me because it's hard to know for sure if a movie is actually about the Devil or not without watching it, often it's a twist and/or intentionally unclear, or not addressed in the movie description, and besides, does it count if it's "only" demons/possession, but not Satan specifically? So I just searched the word Devil and chose 3 that seemed to be safe bets lol.)
1 Amicus film. - Tales From the Crypt
The worst Dracula film (by Letterboxd rating) that you haven't seen and can access. - Dracula 3D (Another film is lower rated but I can't find it streaming on any of my subscriptions)
1 LGBTQ+ connected film - Knife + Heart
5 Films from De Palma, Wes Craven, Ken Russell, Hitchcock and/or Moorhead & Benson. - Sisters, Scream 2, The Lady Vanishes, The Lodger, The Endless
2 Peter Cushing films - Brides of Dracula, Tales from the Crypt
1 film based on a work of or invoking the name Bram Stoker - Renfield
1 film based on a Clive Barker story - Nightbreed
1 film that was released the year that you turned 10 (2001) - Pulse
1 Mario Bava film. - Kill Baby Kill
1 film with an 'x' in the title - X (2022)
And 1 Tobe Hooper Film - Lifeforce