Blood Rage (also known as Nightmare at Shadow Woods and Slasher) is a 1987 American slasher film directed by John Grissmer, written by Bruce Rubin, and starring Louise Lasser, Mark Soper, and Julie Gordon. Set on Thanksgiving, the film follows a woman and her adult son who are stalked at their remote apartment community by the son's unhinged twin brother who has escaped from a psychiatric institution after allegedly murdering a man years earlier.

The film features additional performances from producer Kanter, Jayne Bentzen, as well as a cameo appearance by Ted Raimi. Filmed in 1983 in Jacksonville, Florida, it was released theatrically under the title Nightmare at Shadow Woods in 1987 in a censored cut which eliminated much of the film's elaborate gore special effects. It was subsequently released on home video under the title Blood Rage, though the opening credits identify the film's title as Slasher. The film received a Blu-ray and DVD release by Arrow Films in December 2015, featuring the three varying versions of the film.