Iron Lung is a 2026 American independent science fiction horror film written, edited, and directed by Mark "Markiplier" Fischbach. It is based on the 2022 video game by David Szymanski. The plot follows a convict named Simon (Markiplier) who is forced to pilot a submarine through an ocean of blood on a desolate moon following an apocalyptic event known as the "Quiet Rapture" that caused all the stars and most planets along with their human inhabitants to disappear without warning.
Iron Lung was self-released, by Markiplier in North America on January 30, 2026. The film received mixed reviews from critics and was a box office success, (budget $3 million) grossing $51 million worldwide.
