Linux gaming has gone from a curiosity to a genuinely compelling platform. Thanks to Valve's Proton compatibility layer, thousands of Windows games now run on Linux without the developer doing any extra work. Yet for all the progress on the technical side, many Linux gamers remain fuzzy on one topic: how game licenses actually work across the major storefronts, and what rights you have when you buy a game on this platform.
This guide breaks down the licensing models used by Steam, GOG, and Itch.io, explains what each means for your rights as a Linux player, and helps you decide which storefront fits your gaming philosophy.
Why Game Licensing on Linux Is Slightly Different
On Windows, most commercial games are sold under a proprietary license that grants you a personal, non-transferable right to use the software. The same is broadly true on Linux. What changes on Linux is the delivery ecosystem, the legal structure around compatibility layers, and the open-source components that many Linux-native games bundle in.
Additionally, some games ship with a mix of proprietary game code and open-source engines — id Software's Quake engine, for instance, is GPL-licensed even though the game data is proprietary. Understanding this split is important for anyone who wants to mod, host servers, or redistribute content.
Steam on Linux: Proton, Licenses, and What You Actually Own
The Steam Subscriber Agreement
When you buy a game on Steam, you are not purchasing software in the traditional sense — you are purchasing a license to access the game through the Steam client. This distinction is explicitly stated in Valve's Subscriber Agreement. Steam can technically revoke access if you violate the terms, though this is rare in practice for ordinary users.
On Linux, this is delivered through the Steam client for Linux, which is a first-class supported application. You can install it on Ubuntu, Fedora, Arch, and most mainstream distributions without jumping through hoops.
Proton and the Legal Nuances
Proton is Valve's compatibility layer that lets Windows games run on Linux. It is built on Wine (which is open-source) plus Valve's own additions. Using Proton to run a Windows game you purchased on Steam is entirely within the terms of the Steam license — you are not violating any agreement by using Proton on a game you legitimately own.
Where things get murkier is with anti-cheat systems. Many games use Easy Anti-Cheat or BattlEye, and while both now have Linux/Proton support, some games have not enabled it. In those cases, the online multiplayer component may be inaccessible on Linux, not because of any licensing issue but because of a technical configuration the developer has not activated.
Steam Play and Cross-Platform Licenses
Steam uses a single-purchase cross-platform model for games that support it. If a game is available natively on Linux and Windows, buying it once gives you access to both versions under the same license. You can install and play on either operating system without any additional fee. This is a significant advantage compared to some older software categories where platform licenses were sold separately.
GOG: DRM-Free and What It Really Means
The DRM-Free Promise
GOG (Good Old Games) has built its brand around one core promise: DRM-free games. When you buy a game on GOG, you download actual installer files that you can run without connecting to any server, authenticating with any service, or maintaining any active account. You keep those installer files forever.
This has significant implications for Linux users. If GOG ever shuts down (which CD Projekt, GOG's parent company, has explicitly acknowledged as a hypothetical scenario they have planned for), you can still install and play the games you downloaded. No server handshake required.
The GOG License Agreement
GOG's terms grant you a personal, non-exclusive, non-transferable license to install and use the software. The DRM-free approach does not make the game open-source or free to redistribute — you still cannot legally share the installer files with others or sell your account. What it does mean is that your personal use is not dependent on any online infrastructure.
Linux Support on GOG
GOG has historically been strong on Linux support for classic games, since many of them were originally built for DOS or early Windows and run through DOSBox or ScummVM emulators that have excellent Linux builds. Newer releases are more variable. GOG Galaxy, the optional client, has a Linux version, but it is less feature-complete than the Windows version. Many Linux users prefer to use the Heroic Games Launcher, a third-party open-source client that interfaces with both GOG and Epic Games and is specifically designed for Linux.
Itch.io: The Most Flexible Licensing of the Three
What Makes Itch Different
Itch.io is a marketplace for independent games and software, and it stands apart from Steam and GOG in several important ways. First, developers set their own terms. A game on Itch might be fully proprietary, open-source under a GPL license, Creative Commons licensed, or offered as "pay what you want including $0."
Second, Itch has a native desktop app for Linux that is quite good, and many developers on Itch specifically target Linux as a primary platform, particularly those building with open-source game engines like Godot or Love2D.
Reading Itch Licenses Carefully
Because Itch is a developer-driven marketplace, the license terms vary by game. Before purchasing or downloading, check the game's page for licensing information. Some developers explicitly allow you to stream the game, create YouTube content without a separate license, or redistribute it in bundles. Others apply traditional proprietary restrictions. Do not assume that because a game is inexpensive or open-source-engine-based that the license is permissive — always verify.
The Itch Bundle Model and Charity Bundles
Itch has run several large charity bundles (the Bundle for Racial Justice and Equality, for example, included over 1,700 games for $5). The license terms in these bundles are individual to each game, not set by Itch. This matters if you are a developer or content creator using bundled games in projects.
Open-Source Game Engines and Licensing Crossover
A growing number of Linux games are built with open-source engines. Understanding the engine license helps you understand what you can do with the game.
Godot Engine
Godot is MIT-licensed, meaning the engine itself imposes no restrictions on how you use it or what you do with games built on it. However, the game assets (art, music, story) can still be under a proprietary license. If you buy a Godot game on Itch, you may be able to look at the source code if the developer releases it, but the assets remain the developer's property unless stated otherwise.
Unity and Unreal on Linux
Many commercial Linux games are built with Unity or Unreal Engine. Both engines have had recent controversies around their licensing terms (Unity's abortive per-install fee proposal, and ongoing discussions around Unreal royalties). As a player, these engine licensing debates do not directly affect your rights to play a game you purchased, but they do affect the long-term health of the game and whether the developer can afford to maintain Linux support.
Practical Tips for Linux Gamers Shopping for Licenses
Here is a practical checklist for buying games as a Linux user:
- Check the ProtonDB website before buying any Steam game — it shows community-reported compatibility ratings for Linux/Proton.
- Prefer GOG for older games where long-term access and DRM-free installers matter more than online features.
- Use Itch for indie games, especially those built with Godot or Love2D which tend to have strong native Linux builds.
- If a game has anti-cheat, verify that the developer has enabled Proton/Linux support for it before purchasing.
- Download and store GOG installers locally after purchase — this is the whole point of the DRM-free model.
How Linux Gaming Fits Into the Broader Software License Landscape
Game licenses on Linux mirror the broader trends in software licensing: subscription vs. perpetual, DRM vs. DRM-free, and proprietary vs. open-source. The same questions that apply when buying productivity software — what platform am I locked into, what happens if the company closes, do I actually own this — apply to games as well.
For productivity software on Linux, similar thinking applies. Retailers that focus on transparent licensing, like License Day, help users understand exactly what they are purchasing. The same due diligence that makes you a smarter software buyer applies when choosing between Steam, GOG, and Itch for your gaming library.
Frequently Asked Questions
Is it legal to use Proton on Steam games I purchased?
Yes. Using Proton on a Steam game you legitimately purchased is within Steam's terms of service. Valve developed and maintains Proton specifically for this purpose.
Can I share my GOG installer files with friends?
No. Even though GOG games are DRM-free, the license is personal and non-transferable. Sharing installer files violates the terms of service, just as sharing a downloaded app from any other platform would.
Do Linux versions of games cost more?
No. On Steam and GOG, games are cross-platform under a single purchase price. On Itch, pricing is set by the developer, but it is rare to see platform-specific pricing differentials.
What happens to my Steam library if Valve shuts down?
Valve has stated in its terms that they would attempt to remove DRM from games in such a scenario, but there is no legal guarantee. This is one reason some players prefer GOG for their most valued titles.
Conclusion
Linux gaming has matured dramatically, and understanding the licensing landscape helps you shop smarter. Steam gives you flexibility and the largest catalog with Proton. GOG gives you true ownership through DRM-free installers. Itch gives you access to a vibrant indie ecosystem with the most variable but often most developer-friendly licensing. For any serious Linux gamer, using all three strategically — based on what each does best — is the smartest approach.
