Adam Wingard is returning to the kind of bloody playground where military paranoia, midnight horror, and gleefully nasty violence can collide. With Onslaught, the filmmaker behind The Guest trades giant monsters for something smaller, meaner, and considerably more human. Adria Arjona and Dan Stevens lead a genre mash-up that looks back toward Wingard and Simon Barrett’s scrappier horror days.

There is a twelve-hour countdown ticking somewhere inside Onslaught, and Wingard knows exactly how to make every second feel like a fuse burning toward chaos.

Adria Arjona plays Celeste, a former sniper who has built a guarded life at a trailer park populated by U.S. Army veterans. She manages the compound while carrying the visual scars of her military past, with black-and-white memories of war intruding on the relative quiet of civilian life. That setup gives Onslaught a deceptively grounded beginning. Celeste is not introduced as an unstoppable action heroine. 

Her fragile routine changes when her ex-husband arrives with their daughter Daisy, forcing Celeste into an unexpected maternal role just as something far more sinister begins moving nearby. The film gradually turns the trailer park into a potential fortress, allowing Arjona to shift from hardened survivor to fiercely protective mother. That transformation becomes one of the movie’s strongest emotional threads, giving the later violence a human pulse rather than making it simply another parade of bodies.

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And then Wingard opens the bunker door, revealing the strange machinery behind the madness.

Dan Stevens plays Dr. Hans Kammler, a German scientist whose work involves creating sociopathic super-soldiers for a private military contractor. The film connects his experiments to Operation Paperclip and uses his bunker as a grim bridge between wartime history and modern military-industrial horror. His presence gives Onslaught some of the sinister eccentricity that Wingard has previously brought to villains and genre outsiders.

Once the enhanced soldiers escape into the world, the movie starts speaking in the language of the slasher. Guns, blades, glowing eyes, camouflage, and inventive kills turn ordinary American spaces into hunting grounds. There is a recognizable The Terminator rhythm to the relentless pursuit, while the brutal physicality recalls the ugly charm of The Texas Chain Saw Massacre.

The result is deliberately messy. The film sometimes feels like several midnight movies fighting for the same 92-minute runtime, but that scattered energy also supplies its personality. Matthew Pusti’s score and Wingard’s audiovisual precision keep the tension alive even when the structure wanders.

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What do you think about Onslaught and its military slasher premise? Share your thoughts in the comments.