This 1971 Euro Gothic horror film is a fascinating and genuinely chilling find. The story centers on seven tourists trapped overnight within an eerie German castle, where a succubus targets those indulging in the seven deadly sins—lust, gluttony, greed, sloth, wrath, envy, and pride. "The Devil’s Nightmare," a Belgian/Italian co-production, boasts a strong cast and narrative, all filmed on location at a real castle. Each character embodies a specific sin: Alvin represents pride as the seminarian, Corinne exemplifies envy as a woman who collects men, Mr. Ducha is gluttonous as the tour driver, Howard Foster displays lust, Mr. Mason’s defining trait is wrath, Nancy Foster's greed leads to anger, and Regine personifies sloth. Several characters display more than one sin; for example, Nancy Foster's jealousy stems from her husband’s behavior, alongside envy of other women and a constant state of anger—except when surrounded by gold. Corinne engages in both lust and adultery, while Regine exhibits lust as well. The reviewer raises some amusing points: questioning why the gluttonous driver isn't heavier or how the sleepy blonde can maintain her physique. The seminarian struggles with pride and lust but seemingly avoids mortal sin, and a note is made that he should be aware of deals with the devil. It’s clear the film doesn’t glorify these negative behaviors, as events unfold. A selfless sacrifice also occurs, demonstrating agape love—a Christ-like act. A highlight for many viewers will be the presence of three striking women: a blonde, brunette, and redhead. The succubus is portrayed by Erika Blanc, and all three actresses are notably voluptuous with distinct beauty, a welcome contrast to the often overly thin physiques seen in contemporary American films. Those struggling with lust may want to skip this film, especially given the explicit lesbian scene. Erika Blanc’s performance stands out due to her subtle makeup as the succubus and her ability to shift her facial expressions from beautiful to grotesque—a truly unsettling effect. Some versions of the movie have an unnecessary and tasteless introductory porno-horror sequence added on, which detracts significantly from the film's quality. The DVD version paired with "Messiah of Evil" avoids this issue but suffers from poor sound. Other versions retain the intro but offer better audio. The original title translates to “The Long Night of the Devil” or “The Devil’s Longest Night,” and the reviewer finds "The Devil's Nightmare" a weak alternative, preferring the VHS title, "The Devil Walks at Midnight." Despite being dated, dubbed, and slow-paced due to its 1970 European origins, it remains an enjoyable experience if viewers approach it with those factors in mind. The film explores themes such as God’s existence, the nature of sin, and the conflict between spiritual and carnal desires—universal experiences that resonate deeply. It also examines agape love through a Roman perspective. This is a powerful Gothic horror film, possibly even a masterpiece. The film runs for 95 minutes and was filmed at Château d'Antoing in Belgium. GRADE: A (considering its age and origins)

Source on TMDB