Play the game the movie is based on! Iron Lung is a chilling, dread-driven submarine horror game developed by the creators of iconic titles such as DUSK, Chop Goblins, and Squirrel Stapler. The game is set to be adapted into a movie by renowned content creator Markiplier in 2026, further elevating its status within the horror genre.

Immerse yourself in an intensely claustrophobic experience inside a solitary submarine affectionately nicknamed the "Iron Lung". Your mission is to navigate an ominous ocean of blood without sight, relying solely on limited tools and intuition. With only a single porthole that must stay closed due to deep pressure, every move you make is filled with tension and uncertainty. You’ll need to navigate using an incomplete map, proximity sensors, sound cues, and a primitive external camera—used both to photograph key locations and to get grainy glimpses of the deadly surroundings outside.

Success demands resourcefulness, patience, and a steady nerve. Carefully explore the mysterious blood ocean, capture vital images, and avoid whatever lurking beneath the surface that might discover you. Fail to complete your objectives or become detected, and your eerie journey will come to a deadly end.

The story of Iron Lung unfolds against a backdrop of a vanished universe. Decades ago, every known star and habitable planet inexplicably disappeared, leaving behind a silent void of asteroids and abandoned moons. Humanity's remnants are confined to surviving on space stations and starships, desperately searching for resources that seem forever out of reach. As supplies dwindle and infrastructure deteriorates, hope seems lost.

Hope re-emerges when a peculiar anomaly, known as a Blood Ocean—an ominous, vividly red sea—was discovered on a desolate moon. Although not the first blood ocean identified since the vanishing, initial scans revealed a series of intriguing and potentially valuable anomalous sites located deep within an undersea (or underblood) trench. Your task is to investigate these mysterious locations by piloting an aging, cobbled-together submarine forged from rusty space station parts.

Navigate to these sites, photograph whatever strange phenomena you encounter, and do so before your fragile vessel succumbs to the environment or is detected by whatever lurks in the blood. The game’s haunting atmosphere and compelling storyline make it a standout in the horror adventure genre, with an emphasis on exploration, survival, and the unknown cosmos.

Atmospheric Horror Experience

Enjoy a visceral and terrifying experience built on atmosphere and tension, with limited visibility and reliance on sound and basic instruments.

Unique Gameplay Mechanics

Navigate a dangerous environment using an incomplete map, proximity sensors, external camera, and auditory cues. Your resourcefulness is indispensable as you piece together what lies outside the tiny porthole.

Immersive Storytelling

The narrative explores cosmic mystery, survival, and humanity’s resilience after a universe-wide disappearance. Uncover secrets beneath the blood ocean while managing the threats lurking in the depths.

Upcoming Movie Adaptation

The game’s popularity is expanding with a film adaptation scheduled for 2026, promising to bring this atmospheric horror story to a wider audience under the direction of Markiplier.