Mark Fischbach is known for covering almost everything on YouTube. Now he’s asking his audience to sit in the dark and watch a man drown in blood. Iron Lung, the feature film adaptation of David Szymanski’s cult indie video game, positions itself as a strange theatrical proposition: a claustrophobic submarine thriller set in a post-apocalyptic ocean of viscera, written, directed, and starring a creator better known as Markiplier. Promotional materials confirm a trailer exists, focusing on tone rather than giving away specific plot beats. What we know frames this as something genuinely unusual—a shoestring-budget passion project with the leverage to secure a theatrical release.
The Iron Lung Trailer Sets Expectations for Contained Horror
The marketing for Iron Lung leans into existential dread rather than jump scares. One exchange from the source material—”You did test this thing, right?” “This IS the test.”—signals the film’s approach to tension. There are no safety nets. The trailer frames this as survival horror in its most literal sense.
The premise is stark. A convict is sealed inside a makeshift submarine, sent to explore an ocean of blood on a desolate moon. The submarine shares its name with the medical breathing apparatus invented in 1928 by Phillip Drinker and Louis Shaw. The metaphor is blunt: the vessel is life support for a dying species, piloted by someone society already discarded.
The Quiet Rapture: Post-Apocalyptic Foundation
The narrative hinges on an extinction-level event called “The Quiet Rapture”—a catastrophe that caused all known stars and habitable planets to disappear. The sources describe the setting with grim specificity: “In the rusting halls of crumbling space stations, the last remnants of humanity craft a submarine to explore the bleeding depths… and weld one soul inside to pilot it.”
That last detail is key. The convict isn’t just piloting the Iron Lung; he is welded inside. The search for missing celestial bodies isn’t a heroic expedition. As the source material states directly: “This is not an expedition. It’s an execution.” The film positions hope in this void as “illusionary as the starlight.”
From Steam Hit to Theaters
Iron Lung is based on the Steam video game by David Szymanski, who also joins the cast alongside Fischbach, Seán McLoughlin, and Troy Baker. The film has been in development for years and is finally slated for a small theatrical release starting January 30, 2026, in select US theaters and Canada. Sources indicate it hasn’t premiered at any film festivals yet.
There is something notable about Iron Lung avoiding a direct-to-streaming dump. Fischbach, along with producers Jeff Guerrero and Will Hyde, is pushing a “shoestring budget indie flick” into physical cinemas. It’s a risk. The gap between what the trailer promises—a grim, solitary descent into blood—and what the film delivers will be measured when the lights go down in 2026. If you have a theater showing this, it might be worth checking out just to see if the claustrophobia translates to the big screen.
Summary
- Iron Lung is a feature film adaptation of David Szymanski’s indie game, directed by and starring Mark Fischbach (Markiplier).
- The trailer frames the film as a claustrophobic thriller set after “The Quiet Rapture,” where stars have vanished.
- Plot involves a convict welded into a submarine to explore an ocean of blood on a desolate moon.
- Cast includes Seán McLoughlin, Troy Baker, David Szymanski, Caroline Rose Kaplan, Elsie Lovelock, and Isaac McKee.
- Opens in select US theaters and Canada on January 30, 2026.
FAQ: Iron Lung Trailer Breakdown
What is “The Quiet Rapture” in Iron Lung?
It is the backstory event where all known stars and habitable planets disappeared, leaving humanity stranded on crumbling space stations.
Why is the submarine called the Iron Lung?
It references the 1928 medical device invented by Phillip Drinker and Louis Shaw, serving as a metaphor for mechanical life support in a dying world.
Is Iron Lung a heroic space adventure?
No. The source material explicitly states, “This is not an expedition. It’s an execution,” framing the protagonist’s mission as a likely death sentence.
Who is in the cast of Iron Lung?
The film stars Mark Fischbach, Caroline Rose Kaplan, Seán McLoughlin, David Szymanski, Troy Baker, Elsie Lovelock, and Isaac McKee.
