What we flagged
View all categoriesOur take
A convict pilots a tiny sub through an ocean of blood on a ruined moon in this indie-game adaptation. The MA 15+ covers language, bloody images and some gore. Markiplier keeps most of the film on one man in a metal coffin hearing voices, with relentless f-word use and gooey blood but limited jump scares. Suicide-mission talk and apocalyptic dread fill the runtime. Older teens who handle slow-burn claustrophobia will get it; game fans bring more context
Uplifting themes
Cooperation and doing the right thing get urged over the radio. Hope still feels scarce in the metal coffin. Courage stays quiet under the blood
Story (may spoil tone)
In a post-apocalyptic future where an event known as "The Quiet Rapture" caused all known stars and habitable planets in the universe to disappear, a convict is sent to search an ocean of blood discovered on a desolate moon, using a small submarine nicknamed the "Iron Lung".
Details
Violence Blood-ocean imagery and implied threats do more work than fistfights. K…
Blood-ocean imagery and implied threats do more work than fistfights. Kill talk, radiation, and slamming inside the compartment keep danger close. Few traditional action beats
Language Isolation brings heavy swearing. Frequent f-word under stress, plus s-w…
Isolation brings heavy swearing. Frequent f-word under stress, plus s-word, g-word, b-word, ass, damn, hell and bull s-word. It barely lets up
Drugs / alcohol A character drinks a small jar of medicinal rubbing alcohol inside the…
A character drinks a small jar of medicinal rubbing alcohol inside the sub. No big high follows from that sip. One odd, desperate beat in the dark
Frightening A claustrophobic sub, cosmic horror and a sealed viewport build dread f…
A claustrophobic sub, cosmic horror and a sealed viewport build dread for the whole runtime. Voices and possible monsters press in. Sustained confined fear
Self-harm / suicide Suicide-mission talk comes up, including the sense that death may be th…
Suicide-mission talk comes up, including the sense that death may be the point of the job. No on-screen self-harm act. Talk only inside the sub
Gore / death / weapons Bloody images fill the environment and cover bodies in the sub. Wound d…
Bloody images fill the environment and cover bodies in the sub. Wound detail and a severed-arm beat turn up. Acid-like blood effects add to the mess
Mental health Isolation, doom and prison trauma shape the pilot in the dark. Hallucin…
Isolation, doom and prison trauma shape the pilot in the dark. Hallucinations press on him inside the coffin. The film lives in that frayed headspace
Flashing lights We have not confirmed whether this version contains flashing lights.
We have not confirmed whether this version contains flashing lights.
Family watch notes
What other parents think.
Be the first family to leave a watch note.
Talk after watching
- Simon trades prison for a likely fatal dive. When is freedom worth an almost certain death?
- The viewport is sealed so he cannot see outside. How does blindness change fear?
Ask ClearAge
Iron Lung
Ask about this guide, or name another film to open its ClearAge page.
