Proton — це шар сумісності, що дозволяє іграм Windows запускатися на Linux, використовуючи модифіковану версію Wine і набір впровадження API графіки, який забезпечує високу швидкодію. Команда тривалий час працювала над Proton і його покращенням, чим забезпечили широкий перелік підтримуваних ігор. Proton уже підтримує значну частину API, і більшість ігор просто одразу працюють. Ми продовжуємо роботу над покращенням сумісності Proton. Наша мета: підтримка якнайбільшої кількості ігор.

Для тестування сумісності вашої гри з Proton вам знадобиться середовище Linux. Ви можете інсталювати Linux і Steam на комп’ютері або ж запитати набір для розробників, коли він буде доступний (кількість обмежена). Підготувавши середовище Linux чи набір для розробників, ви можете скористатися наданими інструментами зневадження для запуску збірок гри через віддалений зневаджувач і профілювання швидкодії. Роботу над доступом до цих інструментів ще не завершено, тому на цій сторінці ще з’явиться додаткова інформація протягом найближчих днів.

Proton Anti-Cheat Support

Proton supports some common anti-cheat middleware, including Easy Anti-Cheat and BattlEye.

• Easy Anti-Cheat

  Proton supports Easy Anti-Cheat without requiring any recompilation, but it does require you to manually enable support for your build. For the Epic Online Services version of EAC, see instructions here. For the Kamu version of EAC, follow these steps in order:
  
  1. Go into the SDK Configuration settings menu on the EAC partner site and enable Linux as a client platform.
     
  2. Go into the Client Module Releases menu on the EAC partner site, choose the Unix platform, and activate a module. If you cannot find the Linux module in the status dashboards, please contact EAC support.
     
  3. Once that's done, download the EAC SDK and find the Linux library (\Client\Assets\Plugins\x86_64\libeasyanticheat.so) for the SDK version integrated with your game, rename it to easyanticheat_x64.so, and add it to your depot next to the Windows library (EasyAntiCheat_x64.dll).
     
  4. Lastly, on the Steamworks site, publish a new build of your game containing the new depot contents. (You don't have to make any changes to the game executable, just include the new files in the depot contents.)

• BattlEye

  Proton supports BattlEye and BattlEye-enabled games. Each title requires a manual configuration step, so please email your Valve or BattlEye technical contact for details.

If your title's functionality was previously blocked or limited by anti-cheat, but you've since completed the above steps to enable Proton/Steam Deck support, you can resubmit your game for a follow-up review. Please see the Steam Deck Compatibility Review documentation for more details.

If you have any questions or concerns, please reach out to your Valve technical contact, or post on the Steam Deck Steamworks Development forum at https://steamcommunity.com/groups/steamworks/discussions/27/ .

Known Proton Issues

Below are a few recommendations around areas that have been known to be Proton compatibility issues and likely to induce delays in Proton fully supporting a given title after it launches on Steam:

• .NET / WPF: Our recommendation is to use standalone technologies like Qt for launchers instead of OS-dependent frameworks like .NET / WPF. For best results, skip separate launchers altogether and integrate their functionality into the game client UI instead, where controller support is likely better.
  
• Media Foundation: To save additional bandwidth and disk use, we recommend using standalone codecs like VP9 or AV1.
  
• Anti-cheat: We recommend using user-space anti-cheat components for best results, as they can typically run in the Wine environment and provide the same level of functionality. Kernel-space solutions are not currently supported and are not recommended. Note: we have been working with most anti-cheat technology providers to provide Proton compatibility. If your solution currently isn't working, please reach out to both your vendor and Valve for support.
  
• Anti-tamper / DRM: In general we don't recommend use of such solutions across any PC platforms, as they may impact disk usage and overall performance. Getting them fully functional in the Wine environment can take some time and add significant latency to getting your title supported.

Reporting Issues

If you see any issues with your game on Proton not mentioned above, please report them to the Steamworks Forum, GitHub tracker, or through your Valve contact. We are constantly working on and improving Proton support, and your reports are incredibly helpful.

Setting up a Linux Test Environment

You can test your game on Proton now, by setting up a Linux test environment. It's free--all you need is a PC. For the full instructions, see Developing for Steam Deck without a Dev-Kit.