This is my first year trying Hooptober - 31 horror films in 31 days - with the additional two movies of IT & the remake of IT. The official rules say we can start on September 15th, so it's technically 33 films in 47 days. I've managed to make my list 100% films that I haven't seen before (no rewatches here!) which is as follows:

6 Sequels:
Dawn of the Dead (1978)
Day of the Dead (1985)
The Texas Chainsaw Massacre 2 (1986)
Friday the 13th VI: Jason Lives (1986)
Hellraiser 2 (1988)
Wrong Turn 2: Dead End (2007)

6 Countries:
France: Diabolique (1955)
UK: Lifeforce (1985)
UAE: Djinn (2013)
Canada: Videodrome (1983)
Germany: The Cabinet of Dr. Caligari (1920)
Italy: Tenebre (1982)

6 Decades:
1950's: Diabolique (1955)
1960's: Eyes Without a Face (1960)
1970's: The Exorcist (1973)
1980's: Altered States (1980)
1990's: Sombre (1998)
2000's: Maléfique (2002)

6 Films from Before 1970:
Night of the Living Dead (1968)
Quatermass and the Pit (1967)
Diabolique (1955)
Frankenstein (1931)
Dracula (1931)
The Cabinet of Dr. Caligari (1920)

6 Films from the Following:
Carpenter: The Fog (1980)
Raimi: The Possession (2012)
Whale: Frankenstein (1931)
Browning: Dracula (1931)
Craven: Nightmare on Elm Street (1984)
Tom Holland: Fright Night (1985)

3 People Eating People Films (non-zombie):
Wrong Turn 2: Dead End (2007)
We Are What We Are (2013)
The Green Inferno (2013)

1 Hammer Film:
Quatermass and the Pit (1967)

1 Romero Dead film:
Night of the Living Dead (1968)

1 Terrible Oversight:
Diabolique (1955)

2 Tobe Hooper Films:
Lifeforce(1985)
Djinn (2013)

Additional Films to fill out the List:
Hellraiser (1987)
Re-Animator (1985)
Near Dark (1987)
An American Werewolf in London (1981)
It (1990)
It (2017)