QUICK EASY RULES:

6 countries 
Salem’s Lot (USA) The Wolf House (Chile) The Cabinet of Dr. Caligari (Germany) Wicked City (Japan) At Midnight I’ll Take Your Soul (Brazil) Psycho Goreman (Canada)

8 decades 
The Cabinet of Dr. Caligari (20s) The City of the Dead (60s) Let’s Scare Jessica to Death (70s) The Hunger (80s) Arachnophobia (90s) Bug (2000s) The Wolf House (2010s) Psycho Goreman (2020s)

2 insect centered films
Bug (2006) Arachnophobia (1990)

1 horror film set in space or the future (relative to when it was released)
Sunshine (2007)

2 animated films
The Wolf House (2018) Wicked City (1987)

1 bloodthirsty old person/people film
The Taking of Deborah Logan (2014)

2 1970s regional US films
Let’s Scare Jessica to Death (1971) Deathdream (1974)

The worst horror sequel from the 1990s that you haven’t seen and can access
Leatherface: The Texas Chainsaw Massacre III (1990)

1 German silent film
The Cabinet of Dr. Caligari (1920)

5 films from David Cronenberg, Ti West, Bill Rebane, Charles B. Pierce, William Grefe and/or Joy N. Houck Jr.
Dead Ringers (David Cronenberg, 1988) Shivers (David Cronenberg, 1975) The Dead Zone (David Cronenberg, 1983) The Town That Dreaded Sundown (Charles B. Pierce, 1976) The Legend of Boggy Creek (Charles B. Pierce, 1972)

2 Christopher Lee films 
The City of the Dead (1960) Taste of Fear (1961)

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

1 Stephen King adaptation 
Salem’s Lot (1979)

1 Lon Chaney film (NOT JR)
The Phantom of the Opera (1925)

And 1 Tobe Hooper film (there must  ALWAYS be a Hooper film)
Salem’s Lot (1979)

EXTRA (Mostly Sci Fi Horror):
Night of the comet (1984) The Stuff (1985)
The Blob (1988) War of the Gargantuans (1966) Killer Klowns from Outer Space (1988) Slither (2006) Gamera: Guardian of Universe (1995) Gamera 2: Attack of Legion (1996) Gamera 3: Revenge of Iris (1999)