Repositories list

• GameNetworkingSockets

  Public
  Reliable & unreliable messages over UDP. Robust message fragmentation & reassembly. P2P networking / NAT traversal. Encryption.

  networkingpeer-to-peergame-development+ 2

  networkingpeer-to-peergame-developmentrealtime-messagingreliable-messages

  C++

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  BSD 3-Clause "New" or "Revised" License

  •742742 forks•9.9k9.9k stars•2323 issues•55 pull requests•Updated Aug 26, 2026Aug 26, 2026

• gamescope

  Public
  SteamOS session compositing window manager

  C++

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  Other

  •479479 forks•5k5k stars•826826 issues•124124 pull requests•Updated Aug 26, 2026Aug 26, 2026

• Proton

  Public
  Compatibility tool for Steam Play based on Wine and additional components

  proton

  proton

  C++

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  Other

  •1.6k1.6k forks•33k33k stars•5.1k5.1k issues•4646 pull requests•Updated Aug 26, 2026Aug 26, 2026

• wine

  Public
  Wine with a bit of extra spice

  C

  •

  Other

  •470470 forks•2k2k stars•2222 issues•3535 pull requests•Updated Aug 26, 2026Aug 26, 2026

• dxvk

  Public
  dxvk tree containing branches used by Proton

  C++

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  zlib License

  •4040 forks•475475 stars•00 issues•00 pull requests•Updated Aug 26, 2026Aug 26, 2026

• source-sdk-2013

  Public
  The 2013 edition of the Source SDK

  C++

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  Other

  •3k3k forks•10k10k stars•381381 issues•667667 pull requests•Updated Aug 26, 2026Aug 26, 2026

• SteamOS

  Public
  SteamOS community tracker

  steamos

  steamos

  8484 forks•2.5k2.5k stars•1.4k1.4k issues•11 pull request•Updated Aug 26, 2026Aug 26, 2026

• steam-runtime

  Public
  A runtime environment for Steam applications

  Shell

  •

  Other

  •9595 forks•1.4k1.4k stars•171171 issues•44 pull requests•Updated Aug 25, 2026Aug 25, 2026

• Fossilize

  Public
  A serialization format for various persistent Vulkan object types.

  C++

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  MIT License

  •7777 forks•768768 stars•3636 issues•22 pull requests•Updated Aug 13, 2026Aug 13, 2026

• tracy

  Public
  Frame profiler

  C++

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  Other

  •1.2k1.2k forks•44 stars•00 issues•00 pull requests•Updated Aug 3, 2026Aug 3, 2026

• counter-strike_regional_standings

  Public
  JavaScript

  •5757 forks•326326 stars•2020 issues•1212 pull requests•Updated Aug 3, 2026Aug 3, 2026

• Unity

  Public
  C#

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  BSD 3-Clause "New" or "Revised" License

  •22 forks•6262 stars•55 issues•00 pull requests•Updated Jul 24, 2026Jul 24, 2026

• steam-devices

  Public
  List of devices Steam and SteamVR will want read/write permissions on, to help downstream distributions create udev rules/etc

  linuxsteam

  linuxsteam

  MIT License

  •5858 forks•237237 stars•1414 issues•33 pull requests•Updated Jun 25, 2026Jun 25, 2026

• SteamVR-for-Linux

  Public
  Issue tracker for the Linux port of SteamVR

  linuxvrsteamvr

  linuxvrsteamvr

  5252 forks•1.1k1.1k stars•434434 issues•22 pull requests•Updated Jun 6, 2026Jun 6, 2026

• openvr

  Public
  OpenVR SDK

  sdkhardwarevr+ 3

  sdkhardwarevrsteamvrsteamvr-pluginopenvr-sdk

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  BSD 3-Clause "New" or "Revised" License

  •1.3k1.3k forks•6.6k6.6k stars•999999 issues•4444 pull requests•Updated Mar 27, 2026Mar 27, 2026

• steam-audio

  Public
  Steam Audio

  vrspatial-audiosteam-audio

  vrspatial-audiosteam-audio

  C++

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  Apache License 2.0

  •249249 forks•2.9k2.9k stars•9090 issues•1717 pull requests•Updated Mar 25, 2026Mar 25, 2026

• counter-strike_rules_and_regs

  Public
  CS:GO

  7676 forks•622622 stars•00 issues•1313 pull requests•Updated Dec 8, 2025Dec 8, 2025

• steamvr_unity_plugin

  Public
  SteamVR Unity Plugin - Documentation at: https://valvesoftware.github.io/steamvr_unity_plugin/

  vrsteamvr-plugin

  vrsteamvr-plugin

  C#

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  BSD 3-Clause "New" or "Revised" License

  •263263 forks•1.1k1.1k stars•333333 issues•1313 pull requests•Updated Nov 21, 2025Nov 21, 2025

• unity-xr-plugin

  Public
  OpenVR plugin for Unity's XR API

  C#

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  BSD 3-Clause "New" or "Revised" License

  •6565 forks•333333 stars•6363 issues•99 pull requests•Updated Oct 29, 2025Oct 29, 2025

• Dota2-Gameplay

  Public
  Public Bug Tracker for Dota 2

  105105 forks•1.6k1.6k stars•9.6k9.6k issues•22 pull requests•Updated May 23, 2025May 23, 2025

• steam-for-linux

  Public
  Issue tracking for the Steam for Linux beta client

  linuxsteam

  linuxsteam

  190190 forks•4.8k4.8k stars•3.8k3.8k issues•55 pull requests•Updated Apr 24, 2025Apr 24, 2025

• steamlink-sdk

  Public
  C

  •108108 forks•554554 stars•99 issues•11 pull request•Updated Mar 17, 2025Mar 17, 2025

• vkd3d

  Public
  C

  •

  GNU Lesser General Public License v2.1

  •2020 forks•223223 stars•11 issue•00 pull requests•Updated Nov 21, 2024Nov 21, 2024

• halflife

  Public
  Half-Life 1 engine based games

  C++

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  Other

  •705705 forks•4.4k4.4k stars•2.1k2.1k issues•5353 pull requests•Updated Oct 2, 2024Oct 2, 2024

• Source-1-Games

  Public
  Source 1 based games such as TF2 and Counter-Strike: Source

  tf2source-engineteam-fortress+ 2

  tf2source-engineteam-fortresssource-engine-gamessource-games

  8181 forks•778778 stars•4.5k4.5k issues•88 pull requests•Updated Jun 24, 2024Jun 24, 2024

• csgo-osx-linux

  Public
  Counter-Strike: Global Offensive

  counter-strikecounter-strike-global-offensive

  counter-strikecounter-strike-global-offensive

  6868 forks•850850 stars•1.9k1.9k issues•22 pull requests•Updated Apr 22, 2024Apr 22, 2024

• portal2

  Public
  Issues for the Linux port of Portal 2

  1010 forks•156156 stars•249249 issues•11 pull request•Updated Apr 22, 2024Apr 22, 2024

• steamvr_unreal_plugin

  Public
  SteamVR Input Unreal Plugin - Documentation at: https://github.com/ValveSoftware/steamvr_unreal_plugin/wiki Sample project (UE4.15-4.23): https://githu…

  C++

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  Other

  •3030 forks•186186 stars•2121 issues•00 pull requests•Updated Mar 8, 2024Mar 8, 2024

• Dota-2-Vulkan

  Public
  Tracker for issues specific to the Vulkan version of Dota 2 on Windows, Linux, and macOS

  vulkandota-2

  vulkandota-2

  1212 forks•105105 stars•167167 issues•22 pull requests•Updated Dec 4, 2023Dec 4, 2023

• Dota-2

  Public
  Tracker for issues specific to Linux and Mac in the Reborn client. If you have a general issue or non-system-specific feature request please go to dev.dota2.com

  macoslinuxdota-2

  macoslinuxdota-2

  3838 forks•500500 stars•688688 issues•00 pull requests•Updated Dec 4, 2023Dec 4, 2023