Onslaught (2026) Review: Genetically Engineered Soldiers Run Wild in the Desert

This Onslaught review starts with a simple promise: a lean, bloody action-horror B-movie from director Adam Wingard. A24 released it in the United States on September 4, 2026, and it runs about 92 minutes. It wants to thrill you fast and then get out of the way.

Onslaught Review: The Story So Far (No Spoilers)

The Onslaught plot is easy to explain. A rogue group of genetically engineered super soldiers breaks free in the desert and starts leaving chaos behind. Celeste, a tough Army sniper, has to protect her young daughter from them.

That is the whole setup, and the film is happy to keep it simple. Simon Barrett wrote the screenplay from a story he developed with Wingard. According to Wikipedia, the film also shares a continuity with Wingard's earlier thriller The Guest, which is a nice treat for fans who spot the connection.

If you like your action movie reviews to focus on survival rather than lore, the premise should suit you.

What Works in Onslaught

The film's biggest strength is its attitude. Critics describe it as a strange, funny, blood-soaked romp, and that matches its pulpy spirit. It treats its wild concept with a straight face and a wink at the same time.

The desert setting gives Wingard a stripped-down playground. There is nowhere to hide, which suits a story about a parent hunted by trained killers. The action is built around that tension rather than around complicated plotting.

The short runtime helps as well. The movie moves quickly and does not wear out its welcome. Fans of horror movie reviews who enjoy a throwback creature-feature mood will find plenty of old-school energy here.

Onslaught Cast and Performances

The Onslaught cast is led by Adria Arjona as Celeste. One review praises how well she conveys her character's trauma without saying much, and that quiet intensity anchors the chaos around her.

Dan Stevens plays Hans Kammler, and Eric Wareheim appears as Kovacks. Reginald VelJohnson plays Josiah and Michael Biehn plays Baylor, which adds some fun genre-fan casting. Blake Kennedy is Daisy.

A Mix of Tones

The supporting players lean into the film's heightened tone. That suits the material, though it can tip into cheese. How much you enjoy that will depend on your taste for pulp.

Where Onslaught Stumbles

The main complaint is familiarity. Deep Focus Review argues that the film leans so heavily on nostalgia and John Carpenter homage that it struggles to stand apart. That is a fair concern when so many beats feel borrowed.

Some moments are also predictable. Another critic notes that certain parts are very easy to see coming and that the cheesy tone may be too much for some viewers. If you want surprises, this may not be the film for you.

Critics were mixed overall, and the film has struggled at the box office. Reports suggest it earned a few million dollars against a reported $15 million budget. That does not change how it plays, but it shows it is a niche taste.

Is Onslaught Worth Watching?

Yes, Onslaught is worth watching if you want a fast, gory, tongue-in-cheek genre ride. It does not reinvent anything, but it delivers a clear hook, a strong lead and a brisk pace.

The film is rated R, so expect strong violence. It is best seen as a late-night creature-style thriller, not a prestige drama. Go in with modest expectations and a taste for B-movie fun.

If you want something similar in tone, you might also try our take on Blast (2026), another story about a family fighting back. For background on the film, see its Wikipedia page).

Who Will Enjoy Onslaught

• Fans of Adam Wingard and Simon Barrett, especially viewers who enjoyed The Guest.

• Action-horror fans who like practical, pulpy, Carpenter-style thrills.

• Viewers who want a short, loud movie with a strong lead performance.