Cinemonster's list and official rules.

All first-time watches (except for Dawn of the Dead).
Joining me on this journey into the dark side is beautiful ghoul britnileigh

List to be supplemented by the selections from this year's 12 Hours of Terror at the famous Belcourt Theater.

6 Sequels: (in my case, all #2s)
Ghoulies II
Rec 2
Basket Case 2
This Night I'll Possess Your Corpse
Curse of the Cat People
Dawn of the Dead
Scream 2

6 Countries:
USA: IT, Child's Play, etc.
Italy: All the Colors of the Dark, Cannibal Holocaust
UK: The Innocents, The Mummy, Triangle, etc.
Brazil: This Night I'll Possess Your Corpse
France: Litan
Japan: Hausu
Spain: Anguish, Rec 2
Australia: The Loved Ones
Venezuela: The House at the End of Time

6 Decades:
2010s: mother!, House at the End of Time, etc.
2000s: Inland Empire, The Loved Ones, etc.
1990s: Body Bags, Scream 2, etc.
1980s: Child's Play, Zeder, etc.
1970s: All the Colors of the Dark, Hausu, etc.
1960s: The Innocents, Mr. Sardonicus, etc.
1950s: The Mummy
1940s: The Curse of the Cat People
1930s: Dracula, Mad Love
1920s: The Unknown

6 Films from Before 1970:
The Unknown
Dracula
Mad Love
The Curse of the Cat People
The Mummy
The Innocents
Mr. Sardonicus
Spider Baby
This Night I'll Possess Your Corpse

6 Films from the Following:
Carpenter: Body Bags
Raimi: N/A
Whale: N/A
Browning: The Unkown, Dracula
Craven: Scream 2, New Nightmare
Tom Holland: Child's Play

3 People Eating People Films (non-zombie):
Spider Baby
Cannibal Holocaust
Bone Tomahawk

1 Hammer Film:
The Mummy (1959)

1 Romero Dead film:
Dawn of the Dead (1978)

1 Terrible Oversight:
The Innocents

2 Tobe Hooper Films:
Invaders From Mars
Body Bags

*Bonus* The Two ITs:
IT (1990)
IT (2017)