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Iron Lung
A short horror game where you pilot a tiny submarine through an ocean of blood on an alien moon.
In short, Steam reviewers most often praise “excellent atmospheric sound design” (36 of 100 reviews) and “engaging well-executed concept” (36); the most common complaint is “oversimplified mechanical design” (19). What reviewers agree on ↓
What players say
Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-29 · quoted reviews as of 2026-05-12.
What reviewers agree on
36 of the 100 reviews raise this.
“Incredibly immersive. The fire alarm went off while I was playing and I fully thought it was part of the game.”
“I got the game after seeing the movie, intrigued by the concept and looking for a good scare from a game. Iron Lung did not disappoint. The concept is really fascinating and it was really neat to see the roots of what…”
“Only got into the game after Markiplier's movie announcement. Finally got the time to play it and it was a blast. More than the horror, the tense atmosphere that the game made you feel, while you alone are trapped in a…”
36 of the 100 reviews raise this.
“I got the game after seeing the movie, intrigued by the concept and looking for a good scare from a game. Iron Lung did not disappoint. The concept is really fascinating and it was really neat to see the roots of what…”
“Ironic jumpscare. 10/10 masterpiece, would suffocate again”
“Only got into the game after Markiplier's movie announcement. Finally got the time to play it and it was a blast. More than the horror, the tense atmosphere that the game made you feel, while you alone are trapped in a…”
17 of the 100 reviews raise this.
“I got the game after seeing the movie, intrigued by the concept and looking for a good scare from a game. Iron Lung did not disappoint. The concept is really fascinating and it was really neat to see the roots of what…”
“It's rare that a game frightens you while keeping you confined in a tight space. Iron Lung achieves it by putting you in a small submarine with the (only) window closed and a simple objective - capure photos of points…”
“Just finished the game and WOW. This is such a simple game in terms of gameplay but it is also very unique. Visually not much happens but the claustrophobic atmosphere and the sound effects give you an image of what is…”
14 of the 100 reviews raise this.
“I played this game after watching the movie, and this game is really good at suspense. Sure, the game might not have that much gameplay, mainly being moving a submarine in an area you cant even really see. But the…”
“Iron Lung throws you into a tiny sub with almost no visibility, making the lack of sight part of the terror. You navigate using only maps and sound, which perfectly ramps up the tension. It’s short, but every minute…”
“I avoided a lot of things about this game and went into it with no expectations, this game is very cool! Very short but it very clearly achieved what the dev set out to do. Definitely worth a try”
10 of the 100 reviews raise this.
“Incredibly immersive. The fire alarm went off while I was playing and I fully thought it was part of the game.”
“i feel like iron lung is a game that's very easy to overlook if you haven't played it yourself. and. this sounds pretentious, (but everything is pretentious and i'm talking about video games through the lens of curated…”
“I felt like this is 3D version of the screamer maze from 2000s Surprisingly very engaging despite setting up the most boring gameplay on earth.”
19 of the 100 reviews raise this · 14 of them still recommend the game.
“i feel like iron lung is a game that's very easy to overlook if you haven't played it yourself. and. this sounds pretentious, (but everything is pretentious and i'm talking about video games through the lens of curated…”
“I felt like this is 3D version of the screamer maze from 2000s Surprisingly very engaging despite setting up the most boring gameplay on earth.”
“I played this game after watching the movie, and this game is really good at suspense. Sure, the game might not have that much gameplay, mainly being moving a submarine in an area you cant even really see. But the…”
5 of the 100 reviews raise this · 4 of them still recommend the game.
“It's not repeatable but it's very fun and interactive. Mark was right to make a movie about this game”
“Short fun horror game for the price. easy 100% no more than 2 play throughs needed. Really good!”
“Iron Lung — a game you might enjoy… or a game you aggressively finish out of pure spite (guess which one I did). The concept is actually super cool, and the storyline is there… you just have to dig for it like you’re…”
4 of the 100 reviews raise this · 2 of them still recommend the game.
“This would've been good if it was an actual video game. Almost didn't finish it because after I got the last POI, I saw I missed the 2 POI's in the middle who were drawn black on black... I think it's fair to say it's…”
“Iron Lung throws you into a tiny sub with almost no visibility, making the lack of sight part of the terror. You navigate using only maps and sound, which perfectly ramps up the tension. It’s short, but every minute…”
“Worth a play if you can get it on sale! It’s a short game (can 100% it in an hour) but does it well. You’re stuck inside a submarine, welded shut. In an ocean of blood, traversing with only an x-ray, coordinates and a…”
4 of the 100 reviews raise this · 2 of them still recommend the game.
“I went into Iron Lung knowing nothing about it- and honestly, I came out still knowing nothing about it. The mechanics were interesting, but it feels like by the time you get the hang of things, the game is over. It was…”
“Very short, but an easy 100% and still an enjoyable experience. Very atmospheric, but think it would have benefitted from a little more actual horror and some more lore / research logs or something to find along the way.”
3 of the 100 reviews raise this · 2 of them still recommend the game.
“This would've been good if it was an actual video game. Almost didn't finish it because after I got the last POI, I saw I missed the 2 POI's in the middle who were drawn black on black... I think it's fair to say it's…”
“I originally purchased this game during the whole Titanic submersible implosion incident because I wanted something that explored those themes. It sat untouched in my library since then until I had some time to kill…”
“I found this game not too long ago, I was stuck on how the game mechanics worked, so I whipped up markiplier and about 10 minutes in I joined back in and didnt die a single time. (I almost had a heart attack about 5…”
Counted across 100 English reviews, sampled to match this game's 91.8% positive rating · as of 2026-05-12
“I still can't wrap my head around the fact that out of all the games this one got turned into a movie. The game has an interesting concept for sure but the gameplay is basically just matching coordinates, taking photos and maybe getting startled by cheap jumpscares. Even though…”
— a player, Steam review · 1 hrs played“A deep dive into tension, confusion, and very bad parking 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…”
— a player, Steam review · 4 hrs played“Market pliers Also, got the game as a present for my bday:D”
— a player, Steam review · 1 hrs playedPlayer activity
Monthly average concurrent players. Live data self-collected from the Steam API · history through 2026-06 via SteamCharts.
Achievement stats
Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-10-21.
Price tracking
US-region pricing (USD), sampled twice daily by our own tracker since 2026-07-11. Steam prices vary by region — always confirm your local price on Steam.
Regional prices at last sample, in local currency — Steam sets each region's price independently.
Cheapest → most expensive, converted to USD at ECB reference rates (2026-10-21). Relative comparison only.
Latest official news
Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.
Where's the Behind the Scenes DLC?
Some of you might remember that I promised a free behind the scenes DLC to accompany the release of the Iron Lung Movie. And now the movie's been released for awhile, and there's still no behind the s
Movie Release Date and Final Trailer!
IT'S FINALLY RELEASING!!!In theaters January 30thMore information at https://ironlung.com/
Iron Lung is on PS5!
Iron Lung is now available on the PlayStation 5!https://store.playstation.com/en-us/product/UB0622-PPSA21755_00-0490391273409007That's about all there is to say. Enjoy!(Yes the movie is still happenin
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Screenshots
Official Steam store screenshots — click any shot to enlarge.
Facts & details
From the Steam store record, snapshot 2026-05-12.
| Genres | Adventure, Indie, Simulation |
| Player tags | Horror · Atmospheric · Psychological Horror · Submarine · Underwater · Short · Indie · Pixel Graphics · Minimalist · Adventure · First-Person · Sci-fi (SteamSpy community voting) |
| Features | Single-player · Steam Achievements · Steam Trading Cards · Camera Comfort · Playable without Timed Input · Stereo Sound · Partial Controller Support · Steam Cloud |
| Languages | English * * |
| Achievements | 7 |
Minimum system requirements (PC)
Minimum: 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