Movies like Opus

If you're drawn to Opus's claustrophobic paranoia and slow-burn unmasking of a charismatic manipulator, you'll likely find similar dread in films that trap protagonists in isolated compounds or invitation-only spaces where reality proves engineered—The Sect, Cult Of The Shadow People, and Last Culprit nail this escalating dread most reliably, while The Substance and Omnivores hit similar notes about parasocial devotion weaponized as psychological horror. The common thread across these picks is less about jump scares and more about that suffocating feeling of realizing too late you've entered a sealed system designed by someone else's vision. Pacing-wise, expect methodical reveals over spectacle, with mounting paranoia as the primary engine rather than external threats.