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{{Infobox emulator
|version = {{ProtonVer}}
|active = Yes
|platform = Linux
|target = Windows
|developer = Valve
|website = [https://store.steampowered.com/about/ Steam]
|source = [https://github.com/ValveSoftware/Proton GitHub]
}}
'''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 of Steam Play, Proton is included in the Steam Linux client by default and Valve whitelists [https://www.protondb.com/explore?page=0&selectedFilters=whitelisted several 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-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 Linux games.<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 10 and 11 calls to Vulkan on-the-fly. 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 opt-in the beta program]
* [https://github.com/ValveSoftware/Proton/releases GitHub] releases
==Resources==
* [https://www.protondb.com/ User reported compatibility list]
==Notes==
<references group=N />
==References==
{{Reflist}}
[[Category:Emulators]]
[[Category:Compatibility layers]]
[[Category:Linux emulation software]]
