Iron Lung

Iron Lung is a 2026 American science fiction horror film written and directed by Mark "Markiplier" Fischbach in his feature directorial debut. It is based on the 2022 video game of the same name by David Szymanski. The film stars Markiplier, Caroline Rose Kaplan, Troy Baker, Elsie Lovelock, Elle LaMont, Seán McLoughlin, and Isaac McKee. The plot follows a convict named Simon (Markiplier) who is forced to pilot a submarine through a desolate moon's ocean of blood, after an event known as the Quiet Rapture causes most humans and all stars to disappear without warning. Development on a Iron Lung film adaptation began in April 2023, when Mark Fischbach, better known as Markiplier on YouTube, announced he would be adapting the game into film. Markiplier, who had previously played Iron Lung on his YouTube channel, stated the film would be self-written, self-financed, and star himself alongside Kaplan. Szymanski had been involved with the film since pre-production, assisting with its screenplay and being on set during filming, and that he would have a small cameo in the film. Markiplier also co-produced alongside Will Hyde and Jeff Guerrero. Iron Lung was released in North America on January 30, 2026, to mixed reviews from critics. It has been a commercial success, grossing $37.2 million against a production budget of $3 million.