Changes

|version = 4.11-3{{ProtonVer}}

'''Proton''' is an open-source [[Compatibility layers|compatibility layer]] developed by Valve for running modern Windows-exclusive [[wikipedia:Steam_(software)|Steam]] games on Linux. Announced on August 21st, 2018 as a rework As of Steam PlayOct 2020, Proton is included in the Steam Linux client by default and Valve whitelists [https://steamdb.info/app/891390/info/ 100+ games] known to work out-reportedly about 90% of-the-box.<ref name="protonannouncement">https://steamcommunity.com/games/221410/announcements/detail/1696055855739350561</ref> However, by changing a switch in Steam's settings, Proton can be enabled for all Windows-exclusive games even if they don't currently work.<ref group=N>To do this, click Steam > Settings > Steam Play > "Enable Steam Play for all titles".</ref> Users began compiling test results into compatibility lists, and there is now a portal for checking which games work, linked below. As of the January 17th, 2019 Steam Client beta, Proton can be force-enabled in per-title properties, including for native are playable on Linux games.<ref name="force-enable">https://steamcommunitywww.protondb.com/groups/SteamClientBeta#announcements/detail/1703951108827819236stats</ref>.

==Download=={| cellpadding="4"|-|align=center|{{Icon|Win-big|Lin-big|Mac-big}}|'''[https://store.steampowered.com/about/ Steam]'''<br/><small>Only the Linux version includes Proton.<br />Optionally you can [https://developer.valvesoftware.com/wiki/Category:Beta_Releases opt-in the beta program] for faster access to new features.</small>|-|colspan="3"|<hr/>|-|align=center|{{Icon|Lin}}|[https://github.com/ValveSoftware/Proton/releases GitHub] releases|} ==Overview==Announced on August 21st, 2018 as a rework of Steam Play, Proton is included in the Steam Linux client by default and Valve whitelists [https://steamdb.info/app/891390/info/ 100+ games] known to work out-of-the-box.<ref name="protonannouncement">https://steamcommunity.com/games/221410/announcements/detail/1696055855739350561</ref> However, by changing a switch in Steam's settings, Proton can be enabled for all Windows games even if they don't currently work.<ref group=N>To do this, click Steam > Settings > Steam Play > "Enable Steam Play for all titles".</ref> Users began compiling test results into compatibility lists, and there is now a portal for checking which games work, linked below. As of the January 17th, 2019 Steam Client beta, Proton can be force-enabled in per-title properties, including for running the Windows version of games with a Linux port.<ref name="force-enable">https://steamcommunity.com/groups/SteamClientBeta#announcements/detail/1703951108827819236</ref> Proton is based on [[Wine]] and includes additional components like DXVK, (a library that translates Direct3D 9, 10 and 11 calls to Vulkan on-the-fly), vkd3d-proton (a library that translates Direct3D 12 to Vulkan) and FAudio (an XAudio reimplementation). As a Steam Play feature, it avoids having to set up an additional Steam installation for Wine, which used to be the only way to get Windows-only Steam games working on Linux.

==Download==* [https://store.steampowered.com/about/ Download Steam] and [https://developer.valvesoftware.com/wiki/Category:Beta_Releases optAs of late 2020 most games that are not working still are multiplayer games using third-in the beta program]* [https://githubparty anticheat systems.com/ValveSoftware/Proton/releases GitHub] releases

* [https://www.protondb.com/ ProtonDB] - User reported compatibility list].