A short horror game where you pilot a tiny submarine through an ocean of blood.
Iron Lung is a compact, dread-driven horror game that drops you into a claustrophobic one-man submarine, navigating a blood ocean to photograph key locations. It sits in the ADVENTURE category with a solid 4.60 rating from 164 ratings, and is notable for an upcoming movie adaptation by Markiplier in 2026. The title has 5,000+ total downloads and 480 downloads in the last 30 days, with rankings in us (#28), br (#31), and gb (#35).
Pros & Cons
Unique blood-ocean horror setting distinct from typical submarine titles
Photography-based objective using a primitive external camera
Short, high-tension experience ideal for quick play sessions
Cross-media interest with Markiplier adaptation in 2026
Not a full submarine simulator with expansive depth or combat features
Paid title (not free)
Single-player, narrative-driven experience with no multiplayer components
About Iron Lung
Iron Lung is an adventure app developed by Ducky Dev - John Szymanski.
Download Statistics
Iron Lung has been downloaded 7.6 thousand times. In the last 30 days, the app was downloaded 480 times.
User Ratings
Iron Lung is rated 4.64 out of 5 stars. The rating is based on 190 ratings.
App Information
Iron Lung costs $1.99 to download. The APK download size is 89.26 MB. The latest version available is 1.11. The last update was on December 19, 2025.
Technical Requirements
The app has a content rating of Medium Maturity. The app has been available on Google Play December 2025.
Description
Play the game the movie is based on!
Iron Lung is a short dread-driven submarine horror game from the developer of DUSK, Chop Goblins, and Squirrel Stapler, and being adapted to movie by Markiplier in 2026.
Set entirely within a claustrophobic one-man submarine nicknamed the "Iron Lung," you must blindly navigate an ocean of blood to take photographs of key locations, and hope whatever lives below doesn't find you.
There is only a single porthole on the sub, and it needs to be closed due to depth pressure, so you have to navigate purely via an incomplete map, proximity sensors, sound, and a primitive external camera which can be used to take the pictures you need to complete your mission, or to get a grainy low resolution visual of what's happening outside.
Success will require resourcefulness and patience.
THE STORY:
Decades ago, every known star and habitable planet mysteriously vanished, along with whatever and whoever happened to be on them, leaving behind an empty universe of asteroids and lifeless moons where the only remnants of humanity are those who were on space stations or starships at the time. With supplies gradually dwindling and infrastructure falling into disrepair, the survivors have spent the subsequent years frantically searching for any trace of remaining natural resources. Up until now they have been unsuccessful...
Then, a mysterious anomaly known as a Blood Ocean (which is exactly what it sounds like) was discovered on an otherwise barren moon. It's not the first Blood Ocean found since the vanishing, but initial scans show a collection of potentially useful anomalous locations in a deep undersea (underblood?) trench that require further investigation.
And you're the unlucky sap who gets to investigate, in an aging submarine cobbled together from rusty space station parts.
Find your way to the marked locations, photograph whatever you find there, and try to finish before the sub collapses around you... or you're discovered by whatever lurks in the blood...
Recent changes: Seem to have fixed an error where FOV would be set to a very large number sometimes on exiting.
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Very fun. This game is challenging and long, the claustrophobic ambience makes it even better. Recommend buying if you want a horror game that's actually hard.
★★★★★Skyler Listman· Jan 27, 2026
This game is great I got the game on my PS5 and was talking about it with a friend and found out it came to mobile, so I absolutely had to get my hands on this game I beat the game for the first time ever yesterday on my PS5 now it's time for mobile I love the story and for all you knew folks if you put in the code SM8 into the computer in the iron lung/ submarine your in you get more lore about why you are there anyway love this game so excited for the movie
★★★★★Isaiah Fajardo· Feb 8, 2026
It's a very interesting concept. I really like the idea that You are in an ocean of blood. I also really appreciate the creativity of the movement, and how you go about controlling your sub. The movie is pretty good, however it can feel boring at times. That is because, It's a slow burn type of adventure, and that's what gives the game & movie that feeling of tension. I HIGHLY recommend playing the game first, before seeing the movie though.
★★★★★Gerald Washburn· May 11, 2026
Great game and great port, very well optimized. All I wish for is the cheats feature that's in all the other versions.
★★☆☆☆Ryan H· Apr 4, 2026
Wanted to play this before I got to see the movie but sad to say this is easily one of the most overrated indie games I've ever played. Cool concept, extremely lackluster execution. This deserves a remake.
★☆☆☆☆Dash Roy· Feb 14, 2026
You literally can't do anything that's in the PC version. Why can't you use cheats on mobile, but you can on pc??? The third image is impossible to get.
Google Play Rankings for Iron Lung
This app is not ranked
Technologies used by Iron Lung
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Trust & Safety: Permissions requested are INTERNET and com.android.vending.CHECK_LICENSE; no sensitive permissions detected, indicating standard licensing and online functionality.
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