She was critical of the screenplay, however, concluding that the film "tries to resolve itself in the last three minutes." In his 1983 book "The Best, Worst, and Most Unusual: Horror Films", Darrell Moore notes: "The film never really decided whether it wanted to be a satanic movie or a slasher movie or a mystery, and none of the many subplots, including one about Cassavetes accidentally killing his first wife, go anywhere." Film scholar John Kenneth Muir called the film a "mildly effective horror film" despite its "incomprehensible plot," resulting in a film "more dull than exciting in long stretches." In the 2005 "TLA Video & DVD Guide", the film was awarded one out of five stars, deemed "boring, confusing, and not very exciting." "The Incubus" was released on DVD in 2002 by Elite Entertainment. It was subsequently released on DVD by Scorpion Releasing under their "Katarina's Nightmare Theater" label in 2013. On October 30, 2018, Vinegar Syndrome released a region-free special edition Blu-ray of the film.