What SteamOS is and whether your PC can run it

SteamOS is a Linux-based operating system made by Valve, the company behind Steam. It turns a regular PC into a gaming machine that boots directly into Steam's interface, similar to how a Steam Deck handheld works. You install it on your hard drive or SSD the same way you would install Windows, and it replaces your existing operating system entirely.

Before you start, check whether your hardware will work. SteamOS 3 (the current version) requires an x86-64 processor — that means any Intel or AMD desktop or laptop CPU from the last ten years or so. You need at least 40 GB of free storage space for the installation, though you'll want more for games. A USB port and a way to create a bootable USB drive are also required. SteamOS works on older machines, but performance depends on your graphics card and processor, just as it does with any operating system.

Key Takeaways

  • SteamOS is a free Linux operating system that boots into Steam and replaces Windows or your current OS entirely.
  • You need a bootable USB drive, a PC with an x86-64 processor, and at least 40 GB of storage space to install it.
  • The installation process involves downloading SteamOS, writing it to a USB drive using a tool like Balena Etcher, and booting from that drive.
  • After installation, you log in with a Steam account and can install games from your Steam library just as you would on Windows.
  • SteamOS works best on dedicated gaming PCs; if you need Windows for work or other software, dual-booting or keeping Windows is a better choice.

read SteamOS and prepare your USB drive

Start by downloading SteamOS 3 from the official Steam website. You'll get a compressed file (usually a .zip or .img file) that contains the full operating system. Save this file somewhere you can find it — your Downloads folder is fine.

Next, you need a USB drive that is at least 16 GB in size. Any USB 3.0 drive will work; older USB 2.0 drives are slower but will still function. Plug the drive into your PC. You'll use a tool to write the SteamOS file onto this drive, turning it into a bootable installer. The most common tool for this is Balena Etcher, which is free and works on Windows, Mac, and Linux. read Balena Etcher from balena.io/etcher, install it, and open it.

In Balena Etcher, click "Select image" and choose the SteamOS file you downloaded. Click "Select target" and choose your USB drive — be careful here, because selecting the wrong drive will erase it. Once both are selected, click "Flash" and wait for the process to finish. This usually takes 5 to 15 minutes depending on your USB drive speed.

Back up your data and prepare your PC

Installing SteamOS will erase everything on the drive you install it to. If your PC currently holds files, photos, or programs you want to keep, back them up now to an external drive or cloud storage. This is not optional — once the installation starts, those files are gone.

If your PC is currently running Windows and you want to keep Windows alongside SteamOS (called dual-booting), the process is more complex and requires careful partitioning of your drive. For a first installation, most people choose one drive or partition to wipe completely and install SteamOS on. If you're unsure whether you want to keep Windows, keep it for now — you can always install SteamOS on a second drive later or in a virtual machine to test it first.

Boot from the USB drive and start the installer

Plug your bootable USB drive into the PC where you want to install SteamOS. Restart the computer and watch for a message during startup that says something like "Press F2 to enter Setup" or "Press DEL for BIOS" — the exact key varies by manufacturer. Press that key repeatedly as the computer boots to enter the BIOS or UEFI settings.

In the BIOS or UEFI menu, look for a section called "Boot Order" or "Boot Priority." You need to set the USB drive as the first boot device so the computer starts from the installer instead of your hard drive. The exact steps vary by manufacturer, but you're looking for an option to move the USB drive to the top of the list. Save your changes and exit — usually by pressing F10 or selecting "Save and Exit."

The computer will restart and boot from the USB drive. You should see the SteamOS installer appear on your screen. If you see your normal Windows or Linux desktop instead, the boot order didn't take. Restart again and re-enter the BIOS to check the boot order.

Run the SteamOS installer

Once the installer is running, you'll see a menu with options. Select the language and region you want, then proceed to the disk selection screen. This is where you choose which drive or partition to install SteamOS on. If you have only one drive and you want SteamOS to be your only operating system, select that drive. The installer will warn you that this will erase everything on it — confirm that you want to proceed.

If you have multiple drives and want to keep Windows on one drive and install SteamOS on another, select only the drive you want SteamOS on. The installer will format that drive and begin copying files. This process usually takes 10 to 30 minutes depending on your USB drive speed and your PC's processor.

When the installation is complete, the installer will ask you to remove the USB drive and restart. Do that, and the computer will boot into SteamOS for the first time.

Log in and set up your Steam account

When SteamOS boots for the first time, you'll see a setup screen. You'll be asked to create a local user account for your PC — this is separate from your Steam account. Give it a username and password, then proceed.

Next, you'll be prompted to log in with your Steam account. Enter your Steam username and password. If you have Steam Guard enabled (a security feature), you'll need to enter a code from your phone or email. Once you're logged in, SteamOS will read a list of all the games in your Steam library.

From this point forward, SteamOS works like the Steam Deck. You see your library of games, you can install any game that supports Linux or Proton (Valve's compatibility layer that runs Windows games on Linux), and you launch them directly from the interface. You don't need to use a desktop or open a separate launcher.

Install games and adjust settings

Your Steam library will appear in the main menu. Games that are marked as "Native Linux" or "Proton" will run on SteamOS. Games marked as "Windows only" may still run through Proton, but performance and compatibility vary. You can check whether a specific game is known to work by searching for it on ProtonDB, a community database that tracks which Windows games run well on Linux.

To install a game, select it from your library and click "Install." Choose which drive you want it on if you have multiple drives, and SteamOS will read and install it. Games install to a folder called "steamapps" on your SteamOS drive, just as they do on Windows.

If you want to adjust display settings, audio, or controller options, you can access the Settings menu from the main SteamOS interface. Most settings are straightforward — resolution, refresh rate, and volume controls are all there. If you need to access the underlying Linux desktop for troubleshooting or advanced configuration, you can do that too, but it's not necessary for normal gaming.

Frequently Asked Questions

Can I install SteamOS on a laptop?

Yes, as long as the laptop has an x86-64 processor and enough storage space. Laptops with ARM processors (like some newer MacBooks or Chromebooks) cannot run SteamOS. Installation works the same way, but you'll need to check your laptop's BIOS or UEFI menu to set the USB drive as the boot device, which varies by manufacturer.

What if I want to go back to Windows after installing SteamOS?

You'll need your Windows installation media (a USB drive or DVD with Windows on it) and your Windows product key. Boot from the Windows installer the same way you booted from the SteamOS USB drive, and Windows will overwrite SteamOS. If you didn't back up your Windows key, you may not be able to reactivate Windows afterward.

Will all my Steam games run on SteamOS?

Most modern games will run through Proton, but not all. Older games, games with anti-cheat systems, and some niche titles may not work. Check ProtonDB before installing a game you're unsure about. You can also test a game for two hours and request a refund from Steam if it doesn't work.

Do I need an internet connection to install SteamOS?

You need internet during the initial setup to log in with your Steam account and read your game library. After that, you can play offline games without an internet connection, but you won't be able to read new games or receive updates without reconnecting.

Can I use a keyboard and mouse with SteamOS?

Yes. SteamOS works with standard USB keyboards and mice, as well as wireless ones. You can also use game controllers. If you're using a mouse and keyboard, you can access a desktop environment by holding the Steam button on a controller or using a keyboard shortcut, though most people navigate SteamOS using a controller.