About the Game
Iron Lung is a short dread-driven submarine horror game from the developer of DUSK, The Moon Sliver, and Squirrel Stapler.

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.

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...
FEATURES
- Experimental minimalist gameplay, where your senses are limited and anything could be lurking around you
- Glimpse your surroundings through the lens of a grainy still camera and navigate using an incomplete satellite map and proximity sensors
- Horror based around building dread and paranoia
- Original soundtrack inspired by the work of Aubrey Hodges (Doom 64)
- A short experience intended to be finished in under an hour

THE GAMEPLAY
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...
Screenshots
6 images
Version Information
Steam Patch Notes
Official update history
On the site: Build 12439138
Up to date
Build 12439138
Oct 23, 2023
Cheats Update!
As of today, Iron Lung now has a few fun cheats for you to try! To activate a cheat, type the appropriate command into the computer terminal at the back of the sub. Cheats can be stacked (if you dare). There are only a few at the moment but I hope to add some more later on.
{STEAM_CLAN_IMAGE}/41806420/a6d6cd41726b28a1422b30508b0e1c35e3dbe7c8.jpg
Currently, you can use the following cheats (which are also listed in cheats.txt in the game's install folder):
- chclear - clears all cheats
- chnoir - activates black and white visual mode
- chview - allows you to see out the front porthole
- chrave - makes the lighting more colorful
- chava - adds a speaker to the Iron Lung
- chvest - gives you a light
- chmark - activates 'Markiplier Mode'
Halloween Sale
Iron Lung is going to be 20% off as part of Steam's Halloween sale, which starts on October 26th and ends on Novermber 2nd. This is a great time to tell your friends to pick it up because...
Price Change
...after the end of the Halloween sale on Nov. 2, Iron Lung's price will be changing from $6 to $8, and I want to make sure everyone has ample warning and time to buy it at the current price.
This is the only price increase I plan on doing for Iron Lung (I believe any more than $8 would be unfair), and as before all subsequent updates and DLC will be free. That includes a large collection of behind the scenes photos I plan on releasing as DLC once the movie is out.
When I first released Iron Lung I wasn't confident that people would resonate with the odd concept, and I expected to simply release it and move on. Now that the game has seen (and will probably continue to see) updates in content, features, and usability, I believe $8 is a fairer price, more in line with what similar horror games ask, and more sustainable for me over the long run.
Since my intent here is not to gouge people for money, but rather to make sure Iron Lung is priced competitively for the long haul, I again want to emphasize that if you know anyone who might want Iron Lung in the near future, make sure they know to grab it during the Halloween sale from Oct. 26th to Nov. 2nd.
Build 10788472
Version 2.2
Mar 16, 2023
Version 2.2
- Improved controller support. Game can now be played from beginning to end with a controller, although the computer terminal still requires a keyboard.
Build 8840429
Jun 19, 2022
HOORAY AN UPDATE!
Here's the first large-scale update to Iron Lung, bringing it to version 2.X. I say "first" but truthfully this will likely be the only major content update for the game, other than potential (potential, not promised!) future quality of life updates such as controller support, subtitles, etc.
WARNING: OLD SAVES WILL NOT WORK (SEE BELOW)
MORE LORE
So what does this update bring? Well, first and foremost STORY STUFF. In the form of the C.O.I Informational Terminal, now located in the back of the sub.
{STEAM_CLAN_IMAGE}/41806420/a152c9907039339080e7e3344c3f136ed42f4ca6.jpg
{STEAM_CLAN_IMAGE}/41806420/81a822cf7b5e3e2c9d275afb1f053a62710cba52.jpg
Here you can query various informational documents and learn a little more about the world of Iron Lung. Not a lot mind you. This is not a giant lore bible dump. It's just a way of fleshing things out a bit more than not at all, and maybe giving you some clues about who you are, why you're down there, who sent you, etc. Go ahead and type in whatever you want to learn about, and see if it finds anything!
There's also something new to find out in the depths of the blood ocean...
POINTS SHOP AND TRADING CARDS
I'm also excited to bring you both Steam trading cards (which I know you will just sell for wallet funds to buy hentai match 3 games instead of actually crafting into badges, but that's ok) and points shop items, including this awesome animated profile background by Dusk comic artist Jacob:
{STEAM_CLAN_IMAGE}/41806420/259969e5deb4b8318b493fa0ed6b3be185320fdf.jpg
animation not shown here
ACHIEVEMENTS
{STEAM_CLAN_IMAGE}/41806420/d46fc9b414f6224ed31d44baade8c72a9f0c49f8.png
And if you feel like playing through the whole game again, there are now 7 Steam achievements for you to unlock. Most of these are pretty simple and just for fun, but there are two secret ones for those that really want to delve into the game and find/try things. Or, you know... read someone else's guide lol.
A NOTE ABOUT SAVES
For stupid but unavoidable reasons, saves from a previous version of Iron Lung will not work after this update. For most of you this isn't going to be an issue, but if you happen to have like... saved your game last night and want to continue today or something like that, I've provided a new branch you can use to finish your game. Simply opt into the "save_compatibility" beta branch.
{STEAM_CLAN_IMAGE}/41806420/7901921b167bf8df817b41661d2dfd089a57ac6e.png
WHAT'S NEXT?
I don't plan on adding any more lore or major content to Iron Lung after this, but for those who have been asking... yes, I do plan on revisiting the world in the future. I don't know whether that will be a direct followup or a completely different game set in the same universe. I have ideas for both! Only time will tell...
{STEAM_CLAN_IMAGE}/41806420/8eb959bb408e548235215071cc2bde908ce5f8c0.png
Thanks again for all the support, and stay safe out there in the Blood Ocean...
Build 8622148
Apr 25, 2022
I've added a beta branch to Iron Lung (called, appropriately enough, "beta"). The purpose will be for testing patches before I release them, to make sure I didn't screw something up.
If you'd like to help test Iron Lung, or if you just want to see what new stuff is coming, you can opt in to the beta branch by right clicking on the game in your library, selecting "properties," choosing the "betas" tab, and selecting "beta" from the dropdown list.
Currently patch 1.2 is on the beta branch, which includes fixes for two of the game's biggest bugs (the loading softlock and incorrect resolution defaults for some players), as well as some new behind the scenes shots in the goodies folder. Refer to readme.txt for more info.
If you encounter any issues please report them on the forums, and make sure to specify what version you've been playing.
Thanks!
- David
View on Steam
If you'd like to help test Iron Lung, or if you just want to see what new stuff is coming, you can opt in to the beta branch by right clicking on the game in your library, selecting "properties," choosing the "betas" tab, and selecting "beta" from the dropdown list.
Currently patch 1.2 is on the beta branch, which includes fixes for two of the game's biggest bugs (the loading softlock and incorrect resolution defaults for some players), as well as some new behind the scenes shots in the goodies folder. Refer to readme.txt for more info.
If you encounter any issues please report them on the forums, and make sure to specify what version you've been playing.
Thanks!
- David
Current Release
12439138
Uploaded Feb 02, 2026
System Requirements
OS
N/A
CPU
Any made within the last decade
RAM
1 MB RAM
GPU
Any made within the last decade
How to Install
1
Download all files
2
Extract the .RAR file to a folder (use WinRAR or 7-Zip)
3
Run Iron Lung.exe to play
Troubleshooting tips
• Run Redist/_CommonRedist installers if game won't start
• Add folder to Windows Defender exclusions
• Run as administrator
Download
Direct link available
Size
150 MB
Build
12439138
Password: cracked-games.org or 123
You May Also Like
View AllDownload Iron Lung for PC with a direct link or via torrent. Get the full version of Iron Lung for free. Iron Lung is a Adventure released by David Szymanski.