YouTuber-turned-filmmaker Mark Fischbach has made a bold leap into feature filmmaking with his claustrophobic horror debut, Iron Lung.
Adapted from the cult indie video game of the same name, the film traps viewers inside a submarine alongside a desperate prisoner on what should be a routine mission.
But routine quickly dissolves into something far more sinister in this atmospheric thriller that showcases both impressive ambition and the growing pains of a first-time director.
The result is a flawed yet undeniably captivating experience that announces Fischbach as a filmmaker worth watching.
Escape Room Horror Meets Post-Apocalyptic Dread
Fischbach presents Iron Lung’s cramped submarine setting like a nautical-horror-themed escape room, following his character Simon—a stressed-out prisoner—as he navigates the tight quarters of his underwater prison.
An imposing narrator delivers exposition about a post-apocalyptic world ravaged by The Quiet Rapture, a cataclysmic event that left only fragments of humanity scrambling for survival with dangerously limited resources.
Simon’s mission starts vaguely defined—something about resource and data collection—but transforms into a desperate fight for survival after he loses contact with Ava, played by Caroline Rose Kaplan. She’s the impatient radio dispatcher barking orders through crackling speakers, and once that connection dies, Simon truly finds himself alone.
A Character Study Buried in Questions
Fischbach weaves a more introspective story about penance underneath the surface tension. Simon carries guilt from a pre-dive incident that landed him in this hellish situation, leading to both spiritual and physical deterioration.
However, this deeper character work sometimes gets lost beneath Simon’s constant stream of frantic questions and protests.
How many times are you gonna use me before you let me go?
Why is it so fucking hot down here?
Simon spends much of his screen time voicing panic rather than revealing vulnerability, which can make connecting with his internal struggle challenging.
Fetishistic Attention to Analog Horror
Where Fischbach truly excels is in his meticulous attention to sensory detail. He lingers on extreme close-ups of blood-red condensation sizzling and beading before dripping from leaky overhead pipes.
Audio design becomes a character itself—the blown-out, distorted quality of radio transmissions adds layers of unease and disorientation.
These tactile, analog-horror-friendly elements build an immersive foundation that keeps viewers locked into Simon’s claustrophobic experience. Fischbach continually finds fresh ways to reframe his protagonist as he searches for hidden fixtures, investigates flickering lights, and interacts with analog controls.
The Power of Confined Exploration
Honestly? An even smaller-scale version focusing exclusively on Simon exploring the main cabin could have worked brilliantly.
Watching him discover clues about his mission and piece together survival strategies within those tight quarters demonstrates Fischbach’s strength at creating tension from limitation rather than spectacle.
The time devoted to letting Simon simply exist in this space—rooting around, problem-solving, panicking—elevates what could have been a one-trick concept into something more engaging.
Swinging for the Fences with Mixed Results
Every contained thriller eventually needs a significant tonal shift to justify its existence beyond cool aesthetics. Fischbach recognizes this necessity.
The film’s conclusion takes a trippy turn into body-horror-meets-Lovecraft territory that feels both necessary and reckless. It’s ambitious storytelling that doesn’t quite stick the landing.
After such careful, airtight setup and world-building, the ending feels somewhat watery—reaching for cosmic horror grandeur without fully earning the emotional or narrative payoff.
Too Much Ambition, Too Little Experience
Fischbach demonstrates considerable chutzpah attempting such a difficult climax. He possesses the creative vision but lacks the technical experience to execute it flawlessly.
That imbalance shows, yet it’s precisely what makes Iron Lung fascinating—watching a talented creator push beyond their current abilities reveals both limitations and enormous potential.
A Cult Classic in the Making
Iron Lung represents an undeniable breakthrough for Fischbach as a filmmaker. It’s not perfect—far from it.
But imperfection often births cult classics, and this film has all the markers:
- Unique visual style: Analog horror aesthetics executed with genuine craft
- Ambitious storytelling: Willingness to take narrative risks
- Atmospheric world-building: Post-apocalyptic lore that invites speculation
- Sensory immersion: Audio and visual details that reward repeat viewing
- Flawed execution: Rough edges that add character rather than detract
Films with this particular combination of vision and imperfection tend to develop passionate followings. Audiences forgive missteps when they can feel genuine creative ambition radiating from every frame.
What Iron Lung Reveals About Fischbach’s Future
Perhaps most exciting is what this debut suggests about Fischbach’s trajectory as a filmmaker. He clearly understands tension, atmosphere, and visual storytelling.
His weaknesses—narrative resolution, character depth, tonal consistency—are exactly the skills directors develop through experience and subsequent projects.
Iron Lung proves Fischbach can create compelling cinema from minimal resources and maximum creativity. That’s the foundation exceptional genre filmmakers build careers on.
With more practice crafting endings that match his setups and deepening character work beyond surface-level panic, Fischbach could become a significant voice in atmospheric horror cinema.
For now, Iron Lung stands as an impressive calling card—a flawed debut with undeniable personality and a bright future as audiences discover its claustrophobic charms.