Six countries
Norway- The Innocents (2021)
South Korea - A Tale of Two Sisters (2003)
Italy - Tenebre (1982)
Canada - eXistenZ (1999)
Spain - The Orphanage (2007)
Thailand- The Medium (2021)

Eight decades
1920s - The Unknown (1927)
1960s - Seconds (1966)
1970s - Deep Red (1975)
1980s - Silent Madness (1984)
1990s - Ticks (1993)
2000s - Lake Mungo (2008)
2010s - The Invitation (2015)
2020s - Halloween Ends (2022)

Two insect centred films
Ticks (1993)
Kingdom of the Spiders (1977)

One horror film set in space or the future (relative to when it was released)
Psycho Goreman (2020)

Two animated films
Perfect Blue (1997)
Vampire Hunter D (1985)

One bloodthirsty old person/people film
Strait-Jacket (1964)

Two 1970s regional US films
The Driller Killer (1979)
The Town That Dreaded Sundown (1976)

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

One German Silent
Nosferatu (1922)

Five Films from Cronenberg, Ti West, Bill Rebane, Charles B. Pierce, William Grefe and/or Joy N. Houck Jr.
eXistenZ (1999)
The Dead Zone (1993)
The Sacrament (2013)
Pearl (2022)
The Town That Dreaded Sundown (1976)

Two Christopher Lee films
Fright Night (1985)
Horror Express (1972)

One film with a musician or band in it
Trick Or Treat (1986)

One Stephen King adaptation that is not the first go around
Carrie (2002)

One Lon Chaney film
The Unknown (1927)

And one Tobe Hooper Film 
Salem's Lot (1979)