Based on this master list, the goal of Hoop-Tober 5.0 is to watch 31 horror films in October (one each day) that fit the following criteria:

10 'Anniversary Films' (Release years end in an 8, excluding 2018): The Swarm (1978), Halloween (1978), Invasion of the Body Snatchers (1978), Ringu (1998), The Devil Rides Out (1968), Let the Right One In (2008), The Blob (1958), The Blob (1988), Child's Play (1988), Splinter (2008)
6 countries: USA (Halloween), Japan (Ringu), UK (Hellraiser), South Korea (I Saw the Devil), Italy (Your Vice is a Locked Room and Only I Have the Key), Sweden (Let the Right One In)
6 decades: 1920s (Dr. Jekyll and Mr. Hyde), 1960s (The Devil Rides Out), 1970s (Halloween), 1980s (Maniac), 1990s (Ringu), 2000s (Let the Right One In)
6 films from before 1970: The Devil Rides Out (1968), Dr. Jekyll and Mr. Hyde (1920), The Thing from Another World (1951), Godzilla (1954), The Blob (1958), Seconds (1966)
6 films from the following: Romero, Cronenberg, Clive Barker, Terence Fischer, Sergio Martino, Bill Lustig (mix-and-match, or all one): Scanners (1981), The Devil Rides Out (1968), Hellraiser (1987), Your Vice is a Locked Room and Only I Have the Key (1972), Maniac (1980)
2 flying things that kill you films: Q (1982), The Swarm (1978)
1 silent film as a tribute to A Quiet Place: Dr. Jekyll and Mr. Hyde (1920)
1 aquatic menace film as a tribute to Meg: Dark Water (2002)
2 women directed films: Jennifer's Body (2009), The Slumber Party Massacre (1982)
1 inanimate object comes alive film: Child's Play (1988)
1 film with Barbara Crampton in it: The Lords of Salem (2012)

And 2 Tobe Hooper Films (There must ALWAYS be a Hooper film): Poltergeist (1982), The Funhouse (1981)