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    • GameNetworkingSockets

      Public
      Reliable & unreliable messages over UDP. Robust message fragmentation & reassembly. P2P networking / NAT traversal. Encryption.
      C++
      BSD 3-Clause "New" or "Revised" License
      6979.4k575Updated Apr 18, 2026Apr 18, 2026
    • Proton

      Public
      Compatibility tool for Steam Play based on Wine and additional components
      C++
      Other
      1.4k31k5k39Updated Apr 17, 2026Apr 17, 2026
    • wine

      Public
      Wine with a bit of extra spice
      C
      Other
      3701.9k2233Updated Apr 17, 2026Apr 17, 2026
    • dxvk

      Public
      dxvk tree containing branches used by Proton
      C++
      zlib License
      3646100Updated Apr 17, 2026Apr 17, 2026
    • steam-devices

      Public
      List of devices Steam and SteamVR will want read/write permissions on, to help downstream distributions create udev rules/etc
      MIT License
      53207122Updated Apr 16, 2026Apr 16, 2026
    • gamescope

      Public
      SteamOS session compositing window manager
      C++
      Other
      4014.7k79691Updated Apr 7, 2026Apr 7, 2026
    • counter-strike_regional_standings

      Public
      JavaScript
      533002012Updated Apr 6, 2026Apr 6, 2026
    • source-sdk-2013

      Public
      The 2013 edition of the Source SDK
      C++
      Other
      2.9k9.7k367626Updated Mar 30, 2026Mar 30, 2026
    • openvr

      Public
      OpenVR SDK
      C++
      BSD 3-Clause "New" or "Revised" License
      1.3k6.6k1k44Updated Mar 27, 2026Mar 27, 2026
    • steam-audio

      Public
      Steam Audio
      C++
      Apache License 2.0
      2242.8k889Updated Mar 25, 2026Mar 25, 2026
    • Unity

      Public
      C#
      BSD 3-Clause "New" or "Revised" License
      04910Updated Mar 6, 2026Mar 6, 2026
    • Fossilize

      Public
      A serialization format for various persistent Vulkan object types.
      C++
      MIT License
      68747341Updated Feb 26, 2026Feb 26, 2026
    • counter-strike_rules_and_regs

      Public
      CS:GO
      73615013Updated Dec 8, 2025Dec 8, 2025
    • SteamOS

      Public
      SteamOS community tracker
      772.2k1.2k1Updated Nov 21, 2025Nov 21, 2025
    • steamvr_unity_plugin

      Public
      SteamVR Unity Plugin - Documentation at: https://valvesoftware.github.io/steamvr_unity_plugin/
      C#
      BSD 3-Clause "New" or "Revised" License
      2611.1k33313Updated Nov 21, 2025Nov 21, 2025
    • unity-xr-plugin

      Public
      OpenVR plugin for Unity's XR API
      C#
      BSD 3-Clause "New" or "Revised" License
      65330639Updated Oct 29, 2025Oct 29, 2025
    • steam-runtime

      Public
      A runtime environment for Steam applications
      Shell
      Other
      901.4k1682Updated Sep 30, 2025Sep 30, 2025
    • Dota2-Gameplay

      Public
      Public Bug Tracker for Dota 2
      1001.6k12k1Updated May 23, 2025May 23, 2025
    • steam-for-linux

      Public
      Issue tracking for the Steam for Linux beta client
      1854.7k3.6k5Updated Apr 24, 2025Apr 24, 2025
    • steamlink-sdk

      Public
      C
      10753791Updated Mar 17, 2025Mar 17, 2025
    • vkd3d

      Public
      C
      GNU Lesser General Public License v2.1
      1521310Updated Nov 21, 2024Nov 21, 2024
    • halflife

      Public
      Half-Life 1 engine based games
      C++
      Other
      6854.3k2.1k52Updated Oct 2, 2024Oct 2, 2024
    • Source-1-Games

      Public
      Source 1 based games such as TF2 and Counter-Strike: Source
      807624.4k9Updated Jun 24, 2024Jun 24, 2024
    • SteamVR-for-Linux

      Public
      Issue tracker for the Linux port of SteamVR
      481k4232Updated May 7, 2024May 7, 2024
    • csgo-osx-linux

      Public
      Counter-Strike: Global Offensive
      688341.8k2Updated Apr 22, 2024Apr 22, 2024
    • portal2

      Public
      Issues for the Linux port of Portal 2
      91562411Updated 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++
      Other
      29184210Updated 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
      111041642Updated 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
      374976650Updated Dec 4, 2023Dec 4, 2023
    • steamos-compositor

      Public
      SteamOS session compositing window manager
      C
      40116331Updated Oct 16, 2023Oct 16, 2023
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