Common Sense Media Review
Markiplier's bloody, dystopian horror tale; strong language.
Parents Need to Know
Why Age 16+?
Any Positive Content?
Where to Watch
Videos and Photos
Iron Lung
What's the Story?
In IRON LUNG, it's a bleak future: The stars are no longer visible, the sky is black, and the oceans are filled with blood. The few survivors are struggling, and convicted criminal Simon (Mark "Markiplier" Fischbach) has taken a deal. He'll volunteer to descend into the ocean of blood in an "iron lung" craft, equipped with an X-ray camera, to find whatever information he can, in exchange for his freedom. He finds a skeleton, but he's certain that there's something else down there, too—something alive. The team on the surface orders him to pick up a sample of the skeleton using a special mount, but the more time Simon spends in the blood ocean, the more strange things he discovers, and the less he can believe his eyes and ears.
Is It Any Good?
The debut feature by YouTuber Mark Fischbach, this horror movie is sometimes confusing and disorienting— and certainly more discomfiting than scary—but it's also memorably atmospheric and mysterious. Writer-director and star Fischbach, who's better known to most as Markiplier, adapted the Iron Lung screenplay himself from David Szymanski's video game and appears in every scene, almost always by himself (though fellow popular YouTube gamer Jacksepticeye, whose real name is Seán McLoughlin, also has a role). As someone who's posted thousands of videos (mostly playthroughs of horror games), he has arguably logged more hours in front of a camera, and probably behind it, than any Oscar-nominated movie star. And his on-screen persona is goofy, scruffy, and appealing (he's also known for his series of "try not to laugh" videos).
So can he adapt to actually making horror? Yes and no. Very often, it's not quite clear what's going on in Iron Lung, both because of the storytelling and because of erratic camerawork and/or the overwhelming sound design. The movie is also far too long, almost fatally; it takes some dedication to get through the slow bits. Yet there's something undeniably creepy here that draws viewers in. The small, one-person craft is all we see, and we only learn bits and pieces of the world around us, including vague details of the crime Simon committed that got him here. The photos he takes, which light up a screen and quickly fade, are grainy and unreliable. The craft shudders and groans, and we can only wonder what's out there, in the dark, in the gooey red. On the whole, you have to hand it to Fischbach, who financed and distributed Iron Lung himself, for his ambition and gumption; certainly there's not a lot of that in the movie biz these days.
Talk to Your Kids About ...
Families can talk about Iron Lung's violence. How did it make you feel? Was it exciting? Shocking? What did the movie show or not show to achieve this effect? Why is that important?
Is the movie scary? What's the appeal of horror movies? Why do people sometimes like to be scared?
How does the movie demonstrate the value of courage?
Why do you think Simon accepts such a dangerous mission? Would you have made the same choice?
Characters sometimes speak about doing things for "the greater good." What does this mean to them? To you?
Movie Details
- In theaters : January 30, 2026
- Cast : Mark Fischbach , Caroline Kaplan , Troy Baker
- Director : Mark Fischbach
- Inclusion Information : Asian Movie Director(s) , Korean Movie Director(s) , Multiracial Movie Director(s) , Asian Movie Actor(s) , Korean Movie Actor(s) , Female Movie Actor(s)
- Studio : Markiplier Studios
- Genre : Horror
- Topics : Dystopia , Fantasy ( Monsters )
- Run time : 127 minutes
- MPAA rating :
- MPAA explanation : language, bloody images and some gore
- Last updated : February 11, 2026
Did we miss something on diversity?
Research shows a connection between kids' healthy self-esteem and positive portrayals in media. That's why we've added a new "Diverse Representations" section to our reviews that will be rolling out on an ongoing basis. You can help us help kids by
Suggest an Update
Common Sense Media's unbiased ratings are created by expert reviewers and aren't influenced by the product's creators or by any of our funders, affiliates, or partners.
See how we rate
