Iron Lung — Play Online Free in Browser

About Iron Lung

Pilot a tiny rusted submarine through an ocean of blood, navigating only by blurry photos.

Iron Lung (2022) by David Szymanski is a short, claustrophobic horror game. Sealed in a cramped submarine on a moon covered in a blood ocean, you navigate with coordinates and a camera that takes grainy photos of what lies outside.

It takes under an hour and relies on atmosphere. The browser build is an unofficial web port: loading can take a while, and a keyboard and mouse are recommended.

Author: APSide · Last updated: November 2, 2026 · How we check games

Available browser projects

Open the project website: gn-math.dev

Iron Lung at a glance

Genre: Horror
Original release: 2022
Developer: David Szymanski
Publisher: David Szymanski
Browser version: gn-math.dev
Price: Free
Download: Not required — runs in the browser
Devices: PC or laptop with keyboard and mouse
Online play: No — single-player

How to play Iron Lung in your browser

Press Play in browser — the game opens on gn-math.dev in a new tab.
Wait while the game files load. The first start can take from a few seconds to a few minutes depending on your connection; later starts are faster because the browser caches the files.
Click inside the game window so it captures the keyboard and mouse, then switch to fullscreen (F11 or the host's fullscreen button).
Open the in-game settings to adjust controls, graphics and sound. Progress is normally kept in your browser storage, so don't clear site data if you want to keep your saves.

Iron Lung controls

Default layout for this browser version. Keys can differ between builds, and most hosts let you rebind them in the settings. A USB or Bluetooth gamepad usually works too.

Action	Key
Move	`WASD`
Look around	`Mouse`
Sprint	`Shift`
Crouch	`Ctrl`
Jump	`Space`
Use / interact	`E`
Action	`Right click`
Hotbar slots	`Mouse wheel`
Drop item	`G`
Menu / pause	`Esc`

What to expect from the browser version

The browser version of Iron Lung is an independent web project — a port, recompilation or fan remake — hosted on gn-math.dev. It is not an official release from David Szymanski, and MePlayable does not host any game files: we describe the game and link to the project.

Because the game runs inside a browser tab, some features of the 2022 original may be missing or work differently: online modes, cutscenes, saves, mods and graphics options depend on the build. If something doesn't work, check the host's own notes.

Requirements

A modern desktop browser — Chrome, Edge, Firefox, Opera or Safari 16+ — with WebAssembly and WebGL enabled, at least 4 GB of RAM and a stable connection for the first load. Hardware acceleration should be switched on in the browser settings.

If Iron Lung doesn't start

Black screen or endless loading — update the browser, enable hardware acceleration and reload the page with Ctrl+F5.
No sound — click inside the game window: browsers only allow audio after you interact with the page.
Lag or low FPS — close other heavy tabs and programs, then lower the resolution or graphics settings in the game.
The site doesn't open — the host may be temporarily down or blocked in your region. Try again later or use another project link on this page.

Screenshots (6)

Videos and trailers

Iron Lung: frequently asked questions

Which site hosts the browser version of Iron Lung?

The playable web version of Iron Lung runs on gn-math.dev. MePlayable doesn't host game files: we check the link, explain controls and point you to the project page.

Can I play Iron Lung online for free?

Yes. The browser version on gn-math.dev is free to open, and MePlayable doesn't charge anything — we simply link to the project.

Do I need to download Iron Lung?

No. Iron Lung runs directly in a browser tab using WebAssembly and WebGL, so there is no installer and nothing to download. The browser only caches files to make the next launch faster.

Can I play Iron Lung on a phone?

The browser version is made for computers and expects a keyboard and mouse or a gamepad. Some phones and tablets can open it, but performance and touch controls are not guaranteed.

Can I play Iron Lung with friends?

No. Iron Lung is a single-player game, and the browser version focuses on the solo experience.

Is this the official Iron Lung?

No. The original Iron Lung was developed by David Szymanski and released in 2022. The browser version is a third-party project, and all rights to the game belong to their owners.

Will my progress be saved?

Usually yes: saves are stored in your browser's local storage on this device. They are lost if you clear browser data, use private mode or switch to another browser or device.