The rundown
Onslaught (2026)
Opening against The Runner, this one will be fighting for the same weekend conversation.
Onslaught opens in theaters on September 4, 2026.
Reactr / Trailer Reactions / Onslaught
New here? Reactr is the free trailer reaction maker for creators: watch the trailer below, record your reaction on camera or voice only, and post the clip to your own channel. Studios and brands start here.
In Theaters · September 4, 2026
Onslaught
Trailer Reactions
Scored from what 29 creators said on camera while watching its trailers, out loud, in their own YouTube reaction videos, then again after the film came out. A proprietary Reactr score. How the score works
R
Action · Horror · Thriller
They unleashed their deadliest weapon on us.
When a rogue squad of genetically engineered super soldiers break loose in the desert, a badass Army sniper must unleash hell to protect her young daughter.
Free · no editing · camera or voice only · the clip is yours to post
The Trailer
The Onslaught trailer is here
Dropped July 27, 2026
72This trailer, scored from 16 reaction videos
More Trailers
More Onslaught trailers, newest first
Trailer: Official Trailer (4K)
79This trailer, scored from 13 reaction videos React to this trailer →
Trailer: Official Trailer
React to this trailer →Creator Reactions
What creators said about the Onslaught trailers
Creators posted 29 reaction videos to YouTube watching this trailer campaign. Reactr scored what they actually said, out loud, on camera, and combined it into the Reactr Rating shown at the top of this page. Each trailer drop is scored on its own from the videos reacting to that drop; the number above is the film-level score across all of them. The 10 that counted most are below. How the score works.
Anyway, so Onslaught, let's go. It's got uh the girl everybody wants
interesting and I kind of love this for a next film from Adam Wingard.
It was very boring where like I don't care about these
I'm there day one. But yeah, it looks like a lot
That actually looks good. It looks action, but it seems action
much as everyone else was hyped up on the internet about it? You let
The trailer looks good. Y'all let me know what y'all think
So yeah, great trailer, very intense, very dramatic, very action-packed, and
Like this It's really a perfect time for us, dog on, to be doing
Every reaction above is a creator's own upload on YouTube, credited to their channel. Reaction videos are found automatically; a creator can claim their page or ask for a video to be removed from the creator directory.
Reactr Verdict
Did Onslaught deliver on its trailer?
84The trailer
29 reaction videos scored 77The film itself
11 reaction videos scored
29 reaction videos scored 77The film itself
11 reaction videos scored
Fell short of the trailer-7 points
After release, creators post a second kind of video: their reaction to the film itself. Reactr scores those the same way it scored the trailer reactions, and the two numbers side by side answer one question: did the movie live up to its trailer? A clear gap in either direction is what separates a film that exceeded its trailer from one that simply delivered on it. How the score works.
Production notes
The history behind Onslaught
A24, Ryder Picture Company and Lyrical Media are producing. Adam Wingard directs, with writing credits for Simon Barrett and Simon Barrett. Runtime is listed at 1 hour 32 minutes. It carries an R rating in the US.
On screen
Who you’ll see in the trailer
The cast is fronted by Adria Arjona, Dan Stevens and Eric Wareheim. Adria Arjona plays Celeste.
Why react to this one
This trailer was made to be reacted to
Horror trailers are built for reaction cameras. The dread, the fake-out, the sting: your face does half the storytelling.
Theatrical releases are won in the weeks before opening night, and trailer reactions are where that energy starts. Yours can be part of it.
Reactions on Reactr
Be one of the first to react
Reaction clips for Onslaught will appear here as Reactors share them. The Reactr recorder is free for creators: watch the trailer, record on camera or voice only, and the finished clip is yours to post on your own TikTok, Reels, or Shorts channel.
Record the first reaction →FAQ
Onslaught: quick answers
How do I record a Onslaught trailer reaction?
Open the reaction recorder on your phone at reactr.film/studio/onslaught, choose camera or voice only, and press record while the trailer plays. Reactr captures your reaction and gives you a share-ready clip when the trailer ends. It is free.
Do I have to be on camera?
No. Voice Reaction mode records your commentary with the microphone only: the camera stays off, no face is recorded, and you still get a share-ready clip for your channel.
When does Onslaught come out?
Onslaught is scheduled to open in US theaters on September 4, 2026. Dates can shift, so check back for updates.
Who stars in Onslaught?
Adria Arjona, Dan Stevens, Eric Wareheim, Reginald VelJohnson and Michael Biehn lead the cast, directed by Adam Wingard.
Is Reactr free?
Yes. Recording reaction clips on Reactr is free, with no paywall on the finished clip. You own your clip and can post it to TikTok, Reels, Shorts, or anywhere else. Reactr makes money from studios and sponsors, not from creators.
More trailers this season
Keep reacting
Mutiny
August 21, 2026
Coyote vs. Acme
August 28, 2026
The Last Sunrise
August 26, 2026
The Runner
September 2, 2026
Toxic: A Fairy Tale for Grown-ups
August 26, 2026
Facing El Chapo
August 21, 2026
Your first reaction only happens once
Watch the Onslaught trailer, hit record on camera or voice only, and the clip is yours to post.
React to Onslaught →Are you the rights holder of Onslaught? Send us your press kit and this page is rebuilt from your material, with your assets handed to every creator who reacts.
Film data and images courtesy of TMDB. This product uses the TMDB API but is not endorsed or certified by TMDB.