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Iron Lung on Steam

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A short horror game where you pilot a tiny submarine through an ocean of blood on an alien moon.

Iron Lung is a horror, atmospheric and psychological horror game developed and published by David Szymanski.
Released on March 09th 2022 is available on Windows, Steam Deck and Steam Machine.

It has received 8,170 reviews of which 7,529 were positive and 641 were negative resulting in a rating of 8.9 out of 10. 😎

The game is currently priced at 3.50€ on Steam with a 55% discount, but you can find it for 0.78€ on K4G.


The Steam community has classified Iron Lung into these genres:

Media & Screenshots

Get an in-depth look at Iron Lung through various videos and screenshots.

System requirements

These are the minimum specifications needed to play the game. For the best experience, we recommend that you verify them.

Windows
  • Requires a 64-bit processor and operating system
  • OS *: Windows 7/8/9/10
  • Processor: Any made within the last decade
  • Memory: 1 MB RAM
  • Graphics: Any made within the last decade
  • Storage: 200 MB available space
  • Sound Card: Any
  • Additional Notes: You can run this

User reviews & Ratings

Explore reviews from Steam users sharing their experiences and what they love about the game.

1 hours played
June 2026
I came from the movie. My love for this game is very forced I'll be honest. There isn't much to do. It's a map navigation simulation where in practice, you just calculate you lat/lon and just move in increments of UP - DOWN - LEFT - RIGHT. Was hoping for more atmosphere and world building depth but hey - I can always go watch the movie again. Beat it in an hour. It was fun to larp as Simon for that hour so I recommend.
4 hours played
March 2026
[H1]A deep dive into tension, confusion, and very bad parking[/H1] I’ve finally played this on stream after one of my good friends insisted so much after watching Markiplier’s movie, and all I’ll say is... it didn’t disappoint. Didn't go the way I expected, but it's definitely not a miss either. To begin with, I wouldn’t call this a horror game per se. A thriller? Absolutely. A full-on tension piece? 100%. But horror? Not quite. The whole experience lives in the suspense, the unanswered questions, the lore, and that thick, uncomfortable ambiance. The concept is simple: pilot a windowless submarine using a grid map and coordinates to take 10 photos in a sea of blood. That’s it. No combat, no distractions. Just vibes and the creeping feeling that you’re not as alone as you should be. Most of your time is spent at a tiny terminal reading bits of lore, taking pictures, or worse, trying to navigate this weird environment. And yes, if you lack spatial awareness like a certain someone writing these words, this becomes its own little nightmare. Avoiding walls shouldn’t be hard, and yet here we are. The controls are simple, the length is just right (unless you die in a very dumb way by crashing into something), and the achievements are clear and mostly follow normal completion. You can easily plan them into a first run or wrap things up in a quick half-second one. There are also basic options like sound sliders, nothing fancy but enough to do the job. The cherry on top is the atmosphere and the lore. Honestly, I’d even recommend watching the movie first and then playing. It helps situate the universe a lot more, and you’ll appreciate the small details way more than going in blind. The tension builds slowly, and it works so well because you’re left with so many questions. Now, the ending. I know a lot of people mention it, and yeah, it can feel a bit deceptive if you’re someone who likes a clean wrap-up. It also becomes somewhat predictable at a certain point that you’re not surviving this . Personally, I didn’t mind since I usually care more about the journey than the destination, but I can absolutely see it being a letdown for others. Also worth mentioning: even if there’s no actual math involved, you are using a grid and estimating movement constantly. If numbers or spatial reasoning aren’t your thing (hi again), this might not be the most comfortable experience. It adds to the tension, sure, but also to the occasional frustration. I do think it’s a tiny bit overhyped. It’s a very good game (tense, claustrophobic, confusing, sometimes even a bit rage-inducing) but not the game of the century. If you go in with more grounded expectations, it lands much better. The price can feel a bit high for the length, though it’s an easy grab on sale. If you’re into slow-building tension and atmospheric experiences more than straight-up horror, this is a really solid pick. And if you want to see what questionable submarine navigation looks like in action, you can always check out my playthrough on [url=https://www.twitch.tv/videos/2728170056]Twitch ! For more reviews like this one, please check out [url=https://store.steampowered.com/curator/45639970-Ele%2527s-Little-Recommendation-Corner/] Ele's Little Recommendation Corner ! For reviews covering all types of indies, recent and old, don't hesitate to drop by [url=https://store.steampowered.com/curator/32732116-IndieGems/] IndieGems !
9 hours played
Feb. 2026
I see why Markiplier made a whole damn movie about this. Is it short? yes. Does it have few mechanics? Yes. Is it creepy, original and cool? YES. I'm a little bit late to the party but at the time this was released, the internet was full of unoriginal ass games and this really stood out, I remember that really well. The thought behind this game is really deep and definetly deserves a continuation. The frog beast or whatever it's name is was really cool and i loved how you saw it at one of the nodes stalking you before it attacked the iron lung . I also LOVED the ending and it was perfect? For what it is, 9/10.
5 hours played
Feb. 2026
This is not an expedition. It is an execution. If there is still hope, it lies beyond the veil Iron Lung is great. It's a fantastic slow burn horror experience that has atmosphere, tension and uncertain fate all tied up neatly with interesting lore. David Szymanski knows horror and tension. The Iron Lung Movie takes this and expands upon it greatly with lore, worldbuilding, characters and even more dread awaiting each moment. Massive kudos to Mark and his crew for making the movie and David for the game.
2 hours played
Feb. 2026
This is a pretty cool game, would be lowkey cool if they made a movie about it. Maybe have a Youtuber make it, perhaps even Markiplier.

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Frequently Asked Questions

Iron Lung is currently priced at 3.50€ on Steam.

Yes, Iron Lung is currently available at a 55% discount. You can purchase it for 3.50€ on Steam.

Yes, Iron Lung received 7,529 positive votes out of a total of 8,170 achieving a rating of 8.94.
😎

Iron Lung was developed and published by David Szymanski.

Yes, Iron Lung is playable and fully supported on Windows.

No, Iron Lung is not playable on MacOS.

No, Iron Lung is not playable on Linux.

Yes, Iron Lung is playable on Steam Deck, though it might require a few minor tweaks. Make sure to check the Steam store page and community feedback on ProtonDB for exact compatibility details.

Yes, Iron Lung is playable on Steam Machine, though it might require a few minor tweaks. Make sure to check the Steam store page and community feedback on ProtonDB for exact compatibility details.

No, Iron Lung does not support VR.

Iron Lung is a single-player game.

Yes, there is a DLC available for Iron Lung. Explore additional content available for Iron Lung on Steam.

No, Iron Lung does not support mods via Steam Workshop.

No, Iron Lung does not support Steam Remote Play.

Yes, Iron Lung is enabled for Steam Family Sharing. This means you can share the game with authorized users from your Steam Library, allowing them to play it on their own accounts. For more details on how the feature works, you can read the original Steam Family Sharing announcement or visit the Steam Family Sharing user guide and FAQ page.

You can find solutions or submit a support ticket by visiting the Steam Support page for Iron Lung.

Data sources

The information presented on this page is sourced from reliable APIs to ensure accuracy and relevance. We utilize the Steam API to gather data on game details, including titles, descriptions, prices, and user reviews. This allows us to provide you with the most up-to-date information directly from the Steam platform.

Additionally, we incorporate data from the SteamSpy API, which offers insights into game sales and player statistics. This helps us present a comprehensive view of each game's popularity and performance within the gaming community.

Last Updates
Steam data 15 October 2026 23:17 UTC
SteamSpy data 17 October 2026 02:00 UTC
Steam price 27 October 2026 14:27 UTC
Steam reviews 18 October 2026 21:58 UTC

If you'd like to dive deeper into the details about Iron Lung, we invite you to check out a few dedicated websites that offer extensive information and insights. These platforms provide valuable data, analysis, and user-generated reports to enhance your understanding of the game and its performance.

  • SteamDB - A comprehensive database of everything on Steam about Iron Lung
  • SteamCharts - Analysis of Iron Lung concurrent players on Steam
  • ProtonDB - Crowdsourced reports on Linux and Steam Deck Iron Lung compatibility
Iron Lung
Rating
8.9
7,529
641
Game modes
Features
Online players
14
Developer
David Szymanski
Publisher
David Szymanski
Release 09 Mar 2022
Platforms
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