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For the VPN service, see Proton VPN . Linux compatibility layer for Windows games Proton Break Arcade Games Out running on Arch Linux using Proton Experimental Developers Valve CodeWeavers Release 21 August 2018 ; 7 years ago  ( 21 August 2018 ) Stable release 10.0-4 [ 1 ]   / 27 January 2026 ; 5 months ago  ( 27 January 2026 ) Operating system Linux Available in English Type Compatibility layer License General: 3-clause BSD Wine: LGPLv2.1+ DXVK (and D9VK in older versions): zlib Steam API library: Proprietary Repository Proton on GitHub Proton is a compatibility layer that allows Windows software (primarily video games) to run on Linux -based operating systems. [ 2 ] Proton is developed by Valve in cooperation with developers from CodeWeavers . [ 3 ] It is a collection of software and libraries combined with a patched version of Wine to improve performance and compatibility with Windows games. Proton is designed for integration into the Steam client as "Steam Play". [ 4 ] It is officially distributed through the client, although third-party forks can be manually installed. Overview [ edit ] Proton was initially released on 21 August 2018. [ 5 ] Upon release, Valve announced a list of 27 games that were tested and certified to perform like their native Windows counterparts without requiring end-user tweaking. These include Doom (2016) , Quake , and Final Fantasy VI . [ 4 ] [ 5 ] [ 6 ] [ self-published source ] Proton incorporates several libraries that improve 3D performance. These include Direct3D -to- Vulkan translation layers, namely DXVK for Direct3D 8, 9, 10 and 11, and VKD3D-Proton for Direct3D 12. A separate library known as D9VK handled Direct3D 9 support until it was merged into DXVK in December 2019. [ 7 ] Compatibility [ edit ] Proton generally has better compatibility than upstream Wine due to additional patches and components, such as esync, fshack, and VKD3D-Proton, that Wine has not accepted. [ 8 ] [ 9 ] Many Windows games beyond the official compatibility list work with Proton, albeit unofficially. [ 10 ] The user can optionally force use of Proton for a specific game, even if a Linux version already exists. This may be done when a game's native Linux support is lacking or unstable. ProtonDB [ edit ] ProtonDB is an unofficial community website that collects and displays crowdsourced data describing the compatibility of a given title with Proton, on a rating scale from "Borked" (doesn't work) to "Platinum" (works perfectly). [ 11 ] [ 10 ] The site is inspired by the WineHQ AppDB, which also collects and displays crowdsourced compatibility reports and uses a similar rating system. See also [ edit ] SteamOS Lutris CrossOver References [ edit ] ^ "Proton 10.0-4" . January 27, 2026 . Retrieved January 27, 2026 . ^ "ValveSoftware/Proton" . GitHub . Archived from the original on July 26, 2021 . Retrieved March 3, 2022 . ^ "CodeWeavers' Proton Software Sauce Powers Steam Deck" . CodeWeavers (Press release). February 25, 2022. Archived from the original on March 3, 2022 . Retrieved March 3, 2022 . ^ a b "Steam for Linux :: Introducing a new version of Steam Play" . Steam Community . August 21, 2018. Archived from the original on August 21, 2018 . Retrieved August 12, 2019 . ^ a b Dawe, Liam (August 21, 2018). "Valve officially confirm a new version of 'Steam Play' which includes a modified version of Wine" . GamingOnLinux . ^ Dingman, Hayden (August 21, 2018). "Steam adds Proton, making Windows games playable on Linux (at least in theory)" . PCWorld . Archived from the original on March 15, 2020 . Retrieved August 12, 2019 . ^ "doitsujin/dxvk" . GitHub . Archived from the original on May 26, 2020 . Retrieved April 17, 2020 . ^ Arntzen, Hans-Kristian (January 13, 2026), HansKristian-Work/vkd3d-proton , retrieved January 14, 2026 ^ "fsync patch for wine 6.0-rc1 (without staging)" . bugs.winehq.org . Retrieved January 14, 2026 . ^ a b Dawe, Liam (August 5, 2019). "A look at how Steam Play is doing, based on the ProtonDB reports from July" . GamingOnLinux . Archived from the original on August 24, 2023 . Retrieved July 27, 2020 . ^ "Steam Proton has opened the gaming floodgates for Linux users" . SlashGear . April 22, 2020. Archived from the original on April 8, 2021 . Retrieved July 27, 2020 . External links [ edit ] Media related to Proton (software) at Wikimedia Commons ProtonDB – community database for game compatibility data v t e Unix – Windows interoperability Unix-like subsystems Cygwin Microsoft POSIX subsystem Windows Services for UNIX ( Interix ) Windows Subsystem for Linux (WSL 1) Development environments and shells DJGPP Hamilton C shell MinGW ( MSYS ) Mingw-w64 ( MSYS2 ) MKS Toolkit PowerShell UWIN Ports of Unix-like utilities for Windows GnuWin32 UnxUtils Windows runtime environments for *nix Wabi Willows Toolkit for UNIX Wine ( WINE@Etersoft , Cedega , CrossOver , Darwine , Proton ) Platform virtualization software Cooperative Linux ( TopologiLinux ) Merge Windows Subsystem for Linux (WSL 2) Related APIW Captive NTFS NDISwrapper Windows Interface Source Environment DXVK v t e Valve Games Half-Life Half-Life Opposing Force Blue Shift Decay Half-Life 2 Deathmatch Lost Coast Episode One Episode Two Episode Three (canceled) Half-Life: Alyx Unreleased games Portal Portal Portal 2 The Lab Aperture Hand Lab Aperture Desk Job Counter-Strike Counter-Strike " Dust II " " Inferno " " Mirage " " Nuke " Condition Zero Source Global Offensive Counter-Strike 2 Team Fortress Team Fortress Classic Team Fortress 2 " 2Fort " Team Fortress Comics Heavy Left 4 Dead Left 4 Dead Left 4 Dead 2 Dota Dota 2 Artifact Dota Underlords Other The Orange Box Day of Defeat Source Garry's Mod Alien Swarm The Crossing Deadlock Technology Hardware Current Steam Controller 2015 2026 Steam Deck Steam Frame Steam Machine Discontinued Steam Link Steam Machines Valve Index Software GoldSrc OpenVR Proton Source Source 2 Source Filmmaker Steam Steam Link SteamOS Valve Anti-Cheat People Current Sam Lantinga Mike Morasky Olly Moss Brad Muir Gabe Newell Jay Pinkerton Jake Rodkin Sean Vanaman Robin Walker Erik Wolpaw Former Bay Raitt Chet Faliszek Chris Remo Doug Church Jane Ng Jeri Ellsworth Jess Cliffe Kelly Bailey Kim Swift Marc Laidlaw Michael Abrash Mike Ambinder Mike Booth Mike Harrington Minh Le Viktor Antonov Yanis Varoufakis Related Campo Santo Count to Three Counter-Strike in esports Garry Newman HTC Vive Saxxy Awards Source Mods Steam Trading Cards Still Alive Ted Kosmatka The Steam Awards Turtle Rock Studios Category Retrieved from " https://en.wikipedia.org/w/index.php?title=Proton_(software)&oldid=1339660358 " Categories : 2018 software Compatibility layers Software derived from or incorporating Wine Software using the BSD license Steam (service) Hidden categories: Articles with short description Short description is different from Wikidata Use mdy dates from May 2020 All articles with self-published sources Articles with self-published sources from January 2025 Commons link is the pagename This page was last edited on 21 February 2026, at 18:12  (UTC) . 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