Mubi’s New Slasher Becomes 2026’s Highest-Rated Horror Movie on Rotten Tomatoes, Overtaking ‘Obsession’ & ‘Backrooms’

Horror fans have already had plenty to celebrate throughout 2026, with acclaimed titles like “Obsession” and “Backrooms” both earning Rotten Tomatoes scores above 90 percent and cementing the year as a genuinely strong one for the genre.

That already impressive lineup has now been joined by an even more unlikely critical darling, one whose bizarre title alone has made it impossible to ignore.

That film is “Teenage Sex and Death at Camp Miasma,” the third feature from filmmaker Jane Schoenbrun, best known for their acclaimed 2024 film “I Saw the TV Glow.” The movie follows a queer filmmaker, played by “Hacks” star Hannah Einbinder, hired to resurrect a long-running slasher franchise, who becomes fixated on casting Gillian Anderson’s reclusive actress character, the original film’s final girl, sending both women spiraling into a blood-soaked world of desire, fear, and delirium.

Since debuting theatrically on August 7 following its Cannes Film Festival premiere back in May, where it won the Queer Palm, the film has quietly overtaken every other horror release this year at the box office in one specific department: critical acclaim. With more than 100 reviews now logged, “Camp Miasma” has emerged as the best-scored horror movie of 2026 on Rotten Tomatoes, a margin that comfortably surpasses both “Obsession” and “Backrooms.”

The film’s Rotten Tomatoes standing has shifted slightly as more reviews continue rolling in, dropping from an initial perfect 100 percent after a single negative review broke its streak, though it remains firmly in the high nineties depending on when the score was checked. That kind of near-universal acclaim is exceptionally rare for any horror release, let alone one carrying such a deliberately provocative, attention-grabbing title.

Much of the praise surrounding the film has centered on how thoughtfully it engages with the slasher genre itself while still functioning as a genuinely effective entry within it. The New York Times described the film as designed to knock viewers off balance with a mix of gasps and laughter, while Bloody Disgusting praised how fantasy and reality blur together in what it called breathtaking and whimsical fashion.

Reviewers have consistently singled out the chemistry between Einbinder and Anderson as central to the film’s success, with critics noting how electric their dynamic becomes once the characters’ connection fully takes hold. That connection, according to multiple reviews, doesn’t just drive the film’s central relationship but also deepens its broader themes around self-discovery and embracing one’s truth.

What makes this level of acclaim especially notable is just how unconventional the film’s premise and execution actually are, blending satirical romantic slasher elements with a genuinely heartfelt exploration of fandom, identity, and legacy within horror filmmaking itself. Given how rarely horror films manage this kind of consistent critical praise, “Camp Miasma” has quickly become one of the more surprising success stories of the year within the genre.

With the film continuing its rollout from a limited release into wider theaters, its critical reputation appears likely to keep drawing curious audiences well beyond typical horror fans.

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