RULES:

There must be 31 films.

At least 6 countries
Australia
Canada
Chile
France
Germany
Japan
South Korea
U.K.
U.S.

At least 8 decades
1920s
1930s
1940s
1960s
1970s
1980s
1990s
2000s
2010s
2020s

2 insect centered films
Phase IV (1974)
Wax, or the Discovery of Television Among the Bees (1991)

1 horror film set in space or the future (relative to when it was released)
Prometheus (2012)

2 animated films
The Wolf House (2018)
Wendell & Wild (2022)

1 bloodthirsty old person/people film
The Visit (2015)

2 1970s regional US films
Ganja & Hess (1973)
Deathdream (1974)

The worst horror sequel from the 1990s that you haven't seen and can access
Sleepaway Camp IV: The Survivor (1992)

1 German Silent
M

5 Films from David Cronenberg, Ti West, Bill Rebane, Charles B. Pierce, William Grefe and/or Joy N. Houck Jr.
Videodrome (1983)
The Dead Zone (1983)
eXistenZ (1999)
The House of the Devil (2009)
X (2022)

2 Christopher Lee films
Taste of Fear (1961)
Sleepy Hollow (2009)

1 film with a real-life musician or band in it
The Hunger (1983)

1 Stephen King adaptation that is not the first go around
Pet Sematary (2019)

1 Lon Chaney film (not Jr.)
The Penalty (1920)

1 Tobe Hooper Film (There must ALWAYS be a Hooper film)
Salem's Lot (1979)