Steam is the best default storefront for most Steam Deck owners because buying, installing, updating, controller setup and the Proton compatibility layer are integrated into SteamOS. It is not a guarantee that every Steam game runs. Choose GOG when DRM-free ownership matters, itch.io when you want Linux-native independent games, Epic when its free-game offers justify extra setup, and Humble only after checking the exact offer’s key, download and region terms. Heroic and Lutris can connect several libraries on Linux, but they are launchers and library managers, not replacement stores.
At a glance
| Name | Best for | Key spec | Platforms | Checked |
|---|---|---|---|---|
| Steam | Least setup on Steam Deck | SteamOS includes Proton; four Deck compatibility labels | SteamOS, Linux, Windows, macOS | Oct 2026 |
| GOG | DRM-free purchases and classics | Linux listings; GALAXY desktop client downloads are Windows and Mac | Linux game builds, Windows, macOS | Oct 2026 |
| itch.io | Linux indie discovery | Linux catalog filter and optional Linux app | Linux, Windows, macOS (varies by game) | Oct 2026 |
| Epic Games Store | Weekly free-game offers | Heroic can manage Epic libraries; anti-cheat is game-specific | Windows, macOS; Linux/Deck through third-party launchers | Oct 2026 |
| Humble | Bundles and individual deals after verification | Delivery and redemption destination vary by offer | Varies by offer | Oct 2026 |
These are places to obtain games, not compatibility guarantees. A Linux build, a Windows build launched through Proton or Wine, and a Steam Deck-tested configuration are three different things.
Which game store works best on Steam Deck?
Steam is the strongest all-round choice when you want the fewest moving parts. Valve describes the Deck software as integrating playing, buying, finding and updating games in the handheld interface, while SteamOS includes Proton for running many Windows games (Valve’s Steam Deck software overview).
Why Steam is the easiest default
- The store, library, downloads, updates and controller-oriented interface are part of the Deck experience rather than separate applications.
- Proton is built into SteamOS, so a Windows game can often be selected and launched without manually installing a compatibility manager.
- Valve exposes a game-level compatibility review before purchase. That is more useful than assuming a store-wide Linux label.
Convenience is not the same as universal support. Launchers, video codecs, unusual input systems, display modes and anti-cheat can still prevent a particular title from working properly.
What do Steam Deck Verified, Playable, Unsupported and Unknown mean?
Valve uses four categories: Verified, Playable, Unsupported and Unknown. The label describes Valve’s review of a specific Steam release and can change as the game or its dependencies change; it does not rate every copy sold elsewhere.
Verified
Valve’s definition is that “The game works great on Steam Deck, right out of the box” (Steam Deck Verified). This is the closest thing to a low-friction recommendation, but it still refers to that Steam version and its reviewed configuration.
Playable
Playable means the game runs, but you may need a manual step. Typical examples in Valve’s review include opening an on-screen keyboard, selecting a community control layout, adjusting text size, or using a touchscreen for a launcher.
Unsupported
Unsupported means Valve found a blocking problem under its review criteria. That can involve a game failing to launch, an essential function not working, an incompatible anti-cheat system, or controls and display behavior that make the title impractical.
Unknown
Unknown means the title has not yet been checked in Valve’s program. It is not a positive or negative verdict. Look for current player reports and the game’s own Linux or Deck notes before treating an Unknown listing as a purchase decision.
How should I choose between a native Linux build and Proton?
A native Linux build is compiled for Linux and normally does not need Proton. A Windows build running through Proton or Wine may work very well, but compatibility depends on the game, launcher, graphics features and anti-cheat implementation.
Native Linux build
Native builds can avoid a Windows compatibility layer and may have simpler file locations and launcher behavior. They are still maintained by the developer, so an old Linux build can be less usable than a current Windows build through Proton.
Windows build through Proton or Wine
Proton translates Windows game technologies for Linux. It is the main reason a large Windows catalog is available on SteamOS, but a store page that advertises a Windows copy does not promise Proton support. Anti-cheat drivers, proprietary launchers and unsupported media components are common reasons for failure.
Why storefront labels do not transfer
Valve’s review is tied to the Steam release it examined. Buying a similarly named Epic or GOG copy does not import the Steam label, Proton configuration or launcher behavior. Check the build and redemption route you will actually use.
Does GOG have a Linux launcher?
GOG is the clearest alternative when DRM-free ownership is your priority. Its official description emphasizes that it does not want to control users and their games, and it links to games with Linux versions (GOG About).
What GOG offers Linux users
- Some catalog entries include a Linux installer or build, particularly among classic and independent releases.
- DRM-free installers can be downloaded without requiring a continuously running store client.
- GOG advertises full refunds within 30 days on its About page; read the current detailed terms for exclusions and conditions before relying on that promise.
What GOG does not provide
GOG’s current GALAXY page offers desktop downloads for Windows and Mac, not a native Linux GALAXY client (GOG GALAXY). A Linux game listing therefore should not be confused with a Linux version of the GALAXY client.
How to use GOG on a Deck
- Check the game page for a Linux build, installer format and any separate Windows-only extras.
- For a library-style interface, install Heroic from the Steam Deck’s Discover software center. Heroic’s project describes support for GOG and Epic accounts and for running games with Wine or Proton (Heroic Games Launcher).
- Sign in, install the game, and select a Wine or Proton version when the title is a Windows release.
- Test controls, text size, launcher steps and cloud-save behavior for that specific game; a GOG copy has no Steam Deck Verified review attached to it.
Can I play my Epic games on Linux?
Often, but not automatically. Epic promotes a weekly free-game offer (Epic free games), while Heroic can sign in to an Epic account and install games on Linux or Steam Deck. Whether a particular title runs depends on its Windows build, launcher and anti-cheat system.
What the free offer does and does not mean
Claiming a game during an Epic promotion gives you an Epic entitlement; it does not create a Steam license or an official Linux build. Do not infer compatibility from a game being free, and do not rely on a giveaway schedule without checking the live offer and its claim dates.
Epic setup path on Steam Deck
- Install Heroic through Discover or its documented SteamOS route.
- Sign in to Epic inside Heroic and let it synchronize your library.
- Install the selected game and choose a Proton or Wine runner as offered by the launcher.
- Read the game’s anti-cheat notes before troubleshooting graphics settings. Heroic states that anti-cheat behavior depends on the individual game, so a successful installation is not proof that online play will work.
- Add the game to Steam as a non-Steam shortcut only after it launches; this improves access from Gaming Mode but does not change the license or compatibility status.
Are itch.io games Steam Deck compatible?
itch.io is valuable for discovering independent games with Linux downloads, but compatibility is decided by each creator. Its Linux catalog filter is a useful starting point, and the optional itch app has a Linux download for managing installations and updates (itch.io Linux games).
How to screen an itch.io release
- Open the game’s files list and confirm that a Linux build exists rather than only a Windows executable.
- Check the architecture, required libraries, controller support, resolution options and whether the game expects a keyboard and mouse.
- Look for a portable archive versus an installer; portable files may be easier to manage on a Deck, but the creator’s instructions take priority.
- Keep a fallback plan for games without a Linux build: Proton may work for some Windows releases, while others depend on launchers or anti-cheat that block play.
Heroic lists itch.io integration as planned rather than an available feature (Heroic’s supported-store information). Use itch.io’s own download flow or a manually added non-Steam shortcut instead of assuming Heroic can install every itch title.
Is Humble a good Linux and Steam Deck storefront?
Humble can be a good source of discounts or bundles, but it requires offer-by-offer checking. The available evidence does not establish that every current Humble purchase supplies a Steam key, another key type or a Linux download.
What to verify before paying
- Read the product page’s redemption section and identify the exact destination: Steam, another account, a direct download or a mixture.
- Confirm that the key is available in your region and that it has not been described as a limited-time or delayed delivery.
- Check whether the included files are Linux-native, Windows-only or both.
- Look for separate keys inside a bundle; one item can have different platform support from another.
Lutris documents connecting a Linux client to Humble, GOG and Steam libraries (Lutris). That library connection helps organize games you already own; it does not prove what a particular Humble offer delivers. Heroic lists Humble integration as planned, so do not use it as evidence that every Humble purchase can be installed there.
What is the difference between Heroic, Lutris and a storefront?
Steam, GOG, Epic, itch.io and Humble sell or distribute game entitlements. Heroic and Lutris are tools for signing in, installing and launching games from services you already use.
Heroic Games Launcher
Heroic is designed around Epic and GOG libraries and supports Wine or Proton runners on Linux and SteamOS. Its SteamOS download route is Discover, making it a practical way to bring non-Steam libraries into a Deck workflow, but it cannot turn an unsupported game into a supported one.
Lutris
Lutris is a Linux game manager that can connect multiple libraries and use community installation scripts or runners. Its Humble, GOG and Steam connections are useful for organization, while the actual purchase, entitlement and refund remain with the original store.
Why the distinction matters
- A launcher cannot issue a Steam key for an Epic or Humble purchase.
- A Proton or Wine runner can provide a compatibility route, not an official Linux port.
- Store-specific cloud saves, achievements, refunds and support remain tied to the account and service that sold the game.
How do refunds and ownership differ by store?
Refund rules follow the store and purchase route, not the launcher you use to start a game.
Steam
Valve’s standard Steam game-refund policy uses a request window of within two weeks of purchase and less than two hours played, subject to qualifications and possible additional local consumer rights (Steam Refunds). A Steam key bought from a third party does not automatically use the same Steam-store refund route.
GOG
GOG’s About page advertises full refunds within 30 days. Treat that as a starting point and review the current policy language for the product and circumstances involved.
Epic, itch.io and Humble
The terms can differ by product, seller, region and redemption method. Before buying, open the store’s current refund and delivery information and save the order details; a launcher such as Heroic or Lutris does not replace those terms.
What should I check before buying a Linux or Deck game?
Use this checklist on the exact product page and build you intend to use.
- Platform: Is there a Linux build, or will you depend on Proton/Wine?
- Anti-cheat: Does the game’s online mode support Linux or the selected compatibility layer?
- Launcher: Does it require a separate Windows launcher, account login or browser handoff?
- Controls: Can the game be played with a controller, and does its interface scale to the Deck screen?
- Display: Are text, cut-scenes and resolution options usable at the Deck’s screen size?
- Redemption: Where will the key or download live after purchase?
- Refund: Which store’s policy applies, and does the purchase route preserve your usual refund rights?
- Updates: Will the chosen launcher continue to deliver patches, or will you download them manually?
How can I troubleshoot a non-Steam game on Steam Deck?
- Confirm that the game files match the platform you purchased and that the account is signed in to the correct storefront.
- Try the game’s documented Linux build before adding a Windows build through Proton; native and compatibility-layer files can have different fixes.
- Change the Proton or Wine version in Heroic or Steam, then relaunch rather than changing several settings at once.
- Test with a simple controller layout and windowed or lower-resolution display mode to separate input and rendering problems.
- Check the developer’s current anti-cheat and launcher notes. An anti-cheat block cannot usually be repaired by changing graphics settings.
- If the purchase is still within its store’s refund conditions and the blocker is fundamental, stop troubleshooting and use the correct seller’s refund process.
How much storage should I plan for a Deck library?
Valve specifies a UHS-I microSD slot supporting SDXC in the Steam Deck hardware specification (Steam Deck technical specifications). A UHS-I microSDXC card is therefore the relevant expansion category for a game library, but the specification is not a speed-test result and does not identify a particular card.
Keep the storefront decision separate from storage. A card can hold Steam, GOG, Epic or itch.io files, while each launcher still determines installation paths, updates and compatibility. If you connect an external display or peripherals, a Steam Deck-compatible USB-C dock is another accessory category to verify separately; no particular model is established here.
How we picked these storefronts
The ranking weighs the factors that change a Linux or Deck purchase decision: availability of Linux builds, the clarity of Deck compatibility information, Proton or Wine setup burden, game-specific anti-cheat risk, controller and display expectations, launcher overhead, DRM preference, refund terms and the certainty of the redemption destination. Steam ranks first for integrated Deck workflow; GOG follows for DRM-free ownership; itch.io for Linux-focused indie discovery; Epic for free offers with extra setup; and Humble conditionally because delivery and platform support must be checked for each offer.
Frequently Asked Questions
Does a Steam Deck Verified rating apply to a GOG or Epic copy of the same game?
No. Valve’s rating is attached to the Steam release it reviewed, including that release’s launcher, files and configuration. A separately purchased copy can use different builds, account checks or anti-cheat components, so evaluate it on its own terms.
Does GOG have a native Linux version of GALAXY?
GOG’s current GALAXY download page lists Windows and Mac clients, not a Linux client. Linux users can download a native Linux game when the product supplies one or use a separate manager such as Heroic for supported GOG titles.
Will a Humble bundle always give me a Steam key?
No. Delivery can vary between bundles and individual products. Check the offer’s redemption panel for the exact key platform, direct-download files, region limits and any separate items before checkout.
Can an anti-cheat update break a game that used to run on Linux?
Yes. Anti-cheat behavior is game-specific and can change when the game or its service updates. Recheck the developer’s Linux or Proton notes after an update instead of assuming an earlier launch result still applies.