When Markiplier, the scream king of YouTube, announced that he was making a movie, that idea was wild enough to get people curious. But the movie in question turned out to be a slow, quiet, and deeply suffocating sci-fi horror flick that not only forced itself into thousands of theaters globally but also made a boatload of money in the process. Everyone had to sit up and pay attention.
Interestingly, Iron Lung isn’t flashy or loud, and it has zero interest in whether you like it or not. It bypasses traditional jump scares to deliver something more memorable: a horror movie that’s the cinematic equivalent of locking you in a box, and whispering, “Figure it out.” That stubborn confidence is why it’s living rent-free in the heads of many sci-fi horror fans today.
What ‘Iron Lung’ Is About?
All that confidence in Iron Lung stems from a fairly simple premise. After an event called the “Quiet Rapture” (sounds like the name of a metal band) obliterates every single star and livable planet, the few surviving individuals are forced to get by on dilapidated space stations. No grand hope, no backup plan. Just survival. Just when it seems there’s absolutely no hope for a better tomorrow, they discover a dead moon called AT-5, covered in an ocean of blood. Talk about freaky. However, given how desperate these folks are for resources, it was a no-brainer whether or not to check it out.
The catch? It all seemed too dangerous for a normal person to undertake such a mission. So what do the powers that be do? They settle on Simon (played by Markiplier himself), a convict who’s given a choice: rot in jail for the rest of his life or get welded into a junkyard submarine known as the ‘Iron Lung’ and be dropped in the bloody abyss in exchange for freedom if he completes the mission. Meanwhile, the sub has no front window (pressure would crush it), so Simon has to rely on a janky external camera that takes grainy, delayed photos for navigation. Not exactly a five-star cruise, but that’s it. That’s the whole ride.
From the moment he gets welded in and sent down, most sci-fi horror movies would take things up a notch with jump scares and other crazy anomalies. But not this one. Nothing really happens. You’re just there with him, listening to metal creak, staring at static, and waiting for things to go wrong. And when it does, it’s not scary; it’s just dreadful, in the best way possible. It’s genius, or madness, depending on whom you ask.
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Markiplier’s One-Man Band and the Making of ‘Iron Lung’
It’s no longer a secret that Markiplier wrote, directed, starred in, edited, and even funded the entire thing himself. Usually, that’s a very risky move because that’s how you get a vanity project that the average viewer wouldn’t touch with a ten-foot pole. But somehow Iron Lung completely dodged that bullet. Why? It’s simple, really. Because there was absolutely no doubt as to who was in charge, it was easy for Markiplier to stay focused on what he wanted to achieve with his movie. The Simon he portrayed wasn’t trying to be a hero. He’s just a tired, scared guy who knows nobody’s coming to save him. And that premise works because it’s brutally honest.
He had a killer backup, of course. Caroline Rose Kaplan stars as Ava and Troy Baker as David voice the mission control folks who are about as helpful as that front window would have been on the Iron Lung. Fellow YouTuber, Seán McLoughlin (Jacksepticeye) has a blink-and-you’ll-miss-it cameo that doesn’t feel cheap. And the score? Andrew Hulshult’s soundtrack, including ‘Ocean of Blood,’ ‘Submerged,’ ‘Fate Welded Shut,’ and ‘Iron Casket,’ is just this low anxiety attack. Additionally, having David Szymanski, the original game creator, released in 2022, help write the script ensured the movie stayed true to what made the game terrifying in the first place.
How ‘Iron Lung’ Turned the Box Office Upside Down
One of the biggest draws of this movie is how realistic everything looks and feels. That includes the submarine set. Its grimy, rusted, claustrophobic design creates a “smell-the-panic” vibe, achievable only through real, practical sets (no green screen contraption). Oh, and about that blood… they used over 80,000 gallons (about 300,000 liters) of the fake stuff. That’s a new record for any film, let alone a horror movie, and you can tell that they used every single drop of it just by watching.
But the wildest part of this movie’s journey is how it got into theaters. To say that it exceeded expectations would be putting it mildly. Markiplier’s optimism initially didn’t spread beyond 200 movie theaters. But then he deployed a tactic that’s genius when you think about it. He rallied his millions of fans through a comment in one of his videos about Iron Lung, telling them to reach out to their local theaters and request it. Obviously, they listened because theaters got flooded with requests (they thought it was bots at first!). Then major chains like Regal took notice, and boom, this tiny film exploded into more than 4,000 theaters worldwide (over 3,000 in the U.S. alone).
For now, theaters are still the only place to watch it. There’s no official streaming date and no platform deal quietly waiting to drop. Markiplier has said he plans to handle the home release himself, which means Blu-ray, DVD, and digital versions will come later on his own terms. No studio rush. No streaming algorithm pressure. Just a slow, controlled rollout; kinda like the movie’s whole attitude.
Financially, it’s clear that Markiplier’s gamble to shoulder the majority of the responsibility of bringing Iron Lung to the big screen is paying off spectacularly. He spent $3 million and so far, the movie has pulled in over eight times that amount (more than $30 million and counting), a… peachy return for a slow-burn atmospheric horror film. The reviews, as you’d expect, are all over the place, with some digging the oppressive atmosphere and patient storytelling. Others, though, think it’s a boring punishment. It’s an endless online argument that, for this movie, feels like the perfect reaction.
Why ‘Iron Lung’ Isn’t Your Usual Sci-Fi Horror Flick
Iron Lung, unlike most modern sci-fi horror movies, which seem more and more focused on doing things bigger and louder (more aliens, more explosions), chooses to keep things relatively simple. One location, barely any visuals, and long stretches of silence that make you want to tear out your hair while you’re waiting with Simon for it to end.
That distinction sets it apart from other creator-led horror projects, such as Shelby Oaks (by YouTuber Chris Stuckmann), which rely on found footage energy to generate scares. Iron Lung just traps you. It feels less like a viral clip and more like an old-school, committed theatrical experience that just happens to have been made by a YouTuber. The discomfort isn’t a mistake; it’s the whole point.
If you can, watch the movie in a theater near you and see what all the fuss is about. We’ll see you in the comments after.
