Original

Complete and ranked

10 'Anniversary Films' (Release years end in an 8, excluding 2018)
Abbott and Costello Meet Frankenstein (1948)
The Fly (1958)
Night of the Living Dead (1968)
Hour of the Wolf (1968)
Jaws 2 (1978)
Invasion of the Body Snatchers (1978)
Piranha (1978)
Halloween 4: The Return of Michael Myers (1988)
A Nightmare on Elm Street 4: The Dream Master (1988)
Scooby-Doo on Zombie Island (1998)

6 countries
Black Christmas (Canada)
The Testament of Dr. Mabuse (Germany)
Deep Red (Italy)
A Page of Madness (Japan)
Alucarda (Mexico)
Bad Taste (New Zealand)

6 decades
Black Sabbath (1963)
Sisters (1972)
A Nightmare on Elm Street: The Dream Child (1989)
Ghostwatch (1992)
Dawn of the Dead (2004)
Suspiria (2018)

6 films from before 1970
The Unknown (1927)
The Mummy (1932)
The Invisible Man (1933)
Phantom of the Opera (1943)
Carnival of Souls (1962)
The Devil Rides Out (1968)

6 films from the following: Romero, Cronenberg, Clive Barker, Terence Fisher, Sergio Martino, Bill Lustig (mix-and-match, or all one)
Day of the Dead (Romero)
Creepshow 2 (Romero)
The Fly (Cronenberg)
The Devil Rides Out (Fisher)
Your Vice is a Locked Room and Only I Have the Key (Martino)
Torso (Martino)

2 flying things that kill you films
Phantasm (1979)
Birdemic: Shock and Terror (2010)

1 silent film as a tribute to A Quiet Place
The Cat and the Canary (1927)

1 aquatic menace film as a tribute to Meg
Jaws 2 (1978)

2 women directed films
The Bad Batch (2016)
The Slumber Party Massacre (1982)

1 inanimate object comes alive film
Creepshow 2 (1987)

1 film with Barbara Crampton in it
We Are Still Here (2015)

And 2 Tobe Hooper Films
Poltergeist (1982)
The Texas Chainsaw Massacre 2 (1986)