Session 9 premiered at the
Fantasia Festival in July 2001. It was released to theaters on August 10, playing on 30 screens. On
Metacritic, it has a score of 58% based on reviews from 16 critics, indicating "mixed or average reviews". Some critics praised the film's dark, eerie atmosphere and lack of gore.
Entertainment Weekly called the film "a marvel of
vérité nightmare atmosphere".
Rolling Stone called it "a spine-tingler", and praised Brad Anderson's direction.
Los Angeles Times said of the film: "
Session 9 is so effective that its sense of uncertainty lingers long after the theater lights have gone up."
Bloody Disgusting ranked the film fifth in its list of the twenty best horror films of the 2000s, writing, "
Session 9 isn't just a cheap, hack 'n' slash, instantly-forgettable type horror film, but a psychologically probing, deeply unsettling journey off the edge and into the abyss of the human mind."
Slant Magazine favorably compared it to the 1973 film ''
Don't Look Now'', writing, "Anderson's creeper is nowhere near as profound, but the film's old-fashioned pacing and revelatory camerawork bring to mind Nicolas Roeg|[Nicolas] Roeg's uniquely terrifying dreamworlds." Some reviewers criticized the film's ending. A negative review came from
Variety, which wrote, "while pic works up a nervously eerie paranoia, it finally doesn't know what to do with what it sets up."
San Francisco Chronicle said, "the story doesn't quite pay off, the characters are underwritten and the surprise ending is contrived and unconvincing."
The Village Voice wrote, "the script for
Session 9 is so underwritten that even such lively character actors as David Caruso, Peter Mullan and Brendan Sexton III are left stranded."
Dave Kehr, in a mixed review for
The New York Times, praises the "impeccable" performances and the dialogue's "authentic working-class snap", but criticizes the pacing which "often feels long and aimless", and concludes that the film "loses any sense of urgency or structure" because of Anderson's choice to leave the connections between events unstated. The film later developed a reputation as a
cult film. By 2021 it had been picked up for streaming by
Netflix, and in its 20th anniversary year was screened at the
Brooklyn Horror Film Festival. Marisa Mirabel called it an "underrated gem [that] was ahead of its time in terms of atmospheric and psychological horror." It was reported in August 2021 that Anderson and Gevedon wanted to make a
prequel, but
Focus Films, which held the rights, would not allow it.
Home media USA Films and
Universal Home Entertainment released a
DVD of
Session 9 on February 26, 2002. A
Blu-ray edition was released in August 2016 by
Scream Factory. == Soundtrack ==