Such is the case with Darren Aronofsky‘s 2000 cult classic Requiem For a Dream, which just celebrated its 25th anniversary. While some might argue it isn’t a horror film, I say it is. No, it doesn’t feature an evil force pulling someone out of bed at night, or a planchette being pushed across a Ouija board by unseen hands. But Requiem For A Dream (based on the Hubert Selby Jr. novel of the same name) is all about the demons that live inside of us, and the horrific things people possessed by drug addiction do to themselves — and those they love — in an attempt to survive.

