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Top 23 Steam Open-Source Projects
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ReSharper
ReSharper is now available in VS Code and Cursor. ReSharper brings a professional toolset for C# developers backed by over 20 years of experience, enterprise-grade security, SOC 2 compliance, and the trust of companies worldwide.
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ArchiSteamFarm
C# application with primary purpose of farming Steam cards from multiple accounts simultaneously.
Project mention: ArchiSteamFarm VS steam-game-idler - a user suggested alternative | libhunt.com/r/ArchiSteamFarm | 2026-07-03 -
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bazzite
Bazzite makes gaming and everyday use smoother and simpler across desktop PCs, handhelds, tablets, and home theater PCs.
My newbie recommendation is https://bazzite.gg/. It ships a very simple GUI package manager and the system silently updates in the background. It's also atomic, so rollbacks are easy and destroying the system is hard. It's not a separate distro per-se but a layer atop Fedora Silverblue/Kinoite (you can re-base to/from them without a reinstall).
It's been my daily driver for ~2 years.
The Cachy/Arch approach is more flexible, I'm fine with atomic since containerized workflows are my preference.
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Project mention: SteamAchievementManager VS steam-game-idler - a user suggested alternative | libhunt.com/r/SteamAchievementManager | 2026-07-03
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Project mention: Plugins to choose from: Unlock your Steam Deck's potential | news.ycombinator.com | 2025-11-30
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
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Project mention: Aletheia VS ludusavi - a user suggested alternative | libhunt.com/r/spencer-0003/aletheia | 2025-11-12
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After many years playing on Linux, first struggling with Wine then with Proton when it came out, had to install Windows on my gaming pc. I mostly play Overwatch 2 with friends on my very short free time, thanks to a Steam bug (https://github.com/ValveSoftware/steam-for-linux/issues/1028...), on every single evening I had to wait forever (seriously, 15+ min) for shaders to compile or start the game immediately but suffer on every match beginning (different map) with stuttering.
That’s a deal breaker for me, I tried a fresh Bazzite install (from Arch) before giving up, exact same issue.
I wish Valve comes around one day and fixes that, I’ll kick Windows out of life in a heartbeat.
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Steamless
Steamless is a DRM remover of the SteamStub variants. The goal of Steamless is to make a single solution for unpacking all Steam DRM-packed files. Steamless aims to support as many games as possible.
Project mention: It's not about physical vs. digital games, it's about ownership | news.ycombinator.com | 2026-07-05Also the steam DRM on a lot of single player games can be removed very easily. https://github.com/atom0s/Steamless
and is a recommended step for engine modding games like skyrim.
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Fortunately, I mostly avoided ever becoming "Googled" to start with.
The solution to most 2FA issues (including the one described here) is Stratum.
https://stratumauth.com/
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NonSteamLaunchers-On-Steam-Deck
Installs the latest UMU/GE-Proton and Non Steam Launchers under 1 Proton prefix folder and adds them to your steam library. Installs... Battle.net, Epic Games, Ubisoft, GOG, EA App, Amazon Games, itch.io , Legacy Games, The Humble Games Collection, IndieGala, Rockstar Games Launcher,PS Plus, Glyph, VKPlay & HoYoPlay, Waydroid and Games on SD Card.
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SteamKit
SteamKit2 is a .NET library designed to interoperate with Valve's Steam network. It aims to provide a simple, yet extensible, interface to perform various actions on the network.
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steamtinkerlaunch
Linux wrapper tool for use with the Steam client for custom launch options and 3rd party programs
Project mention: Linux gaming is faster because Windows APIs are becoming Linux kernel features | news.ycombinator.com | 2026-05-13I'm familiar with MO2 from when I used windows, but I had a hard time getting it working on Linux. First problem was getting it installed. I found https://github.com/sonic2kk/steamtinkerlaunch which is supposed to let you install it into each game's wine/proton prefix which worked, but when I then tried to launch the game it would run with absolute terribile performance (like even just the title screen would lag and stutter...)
How did you install it? Maybe with a different method it would work for me better (even though now I'll probably just stick with my own tool I'm still curious)
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With those unfortunate specs a used PS5 + Steam Deck OLED still is the far better price/value.
HDR on that screen is just something to behold:
https://github.com/streetpea/chiaki-ng
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ValveResourceFormat
Source 2 Viewer is an all-in-one tool to browse VPK archives, view, extract, and decompile Source 2 assets, including maps, models, materials, textures, sounds, and more.
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TcNo-Acc-Switcher
A Super-fast account switcher for Steam, Battle.net, Epic Games, Origin, Riot, Ubisoft and many others!
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valheim-server-docker
Valheim dedicated gameserver with automatic update, World backup, BepInEx and ValheimPlus mod support
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
Steam discussion
Steam related posts
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Show HN: Millennium – Steam Homebrew
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The Whole Half-Life
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It's not about physical vs. digital games, it's about ownership
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SteamAchievementManager VS steam-game-idler - a user suggested alternative
2 projects | 3 Jul 2026 -
idle_master_extended VS steam-game-idler - a user suggested alternative
2 projects | 3 Jul 2026 -
ArchiSteamFarm VS steam-game-idler - a user suggested alternative
2 projects | 3 Jul 2026 -
Steam Machine
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A note from our sponsor - ReSharper
www.jetbrains.com | 15 Aug 2026
Index
What are some of the best open-source Steam projects? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | SteamTools | 26,477 |
| 2 | ArchiSteamFarm | 13,624 |
| 3 | HeroicGamesLauncher | 12,009 |
| 4 | bazzite | 8,933 |
| 5 | SteamAchievementManager | 8,881 |
| 6 | decky-loader | 7,118 |
| 7 | Borderless-Gaming | 6,542 |
| 8 | ludusavi | 6,115 |
| 9 | tModLoader | 5,539 |
| 10 | steam-for-linux | 4,810 |
| 11 | Steamless | 4,808 |
| 12 | docker-steam-headless | 4,702 |
| 13 | app | 4,546 |
| 14 | NonSteamLaunchers-On-Steam-Deck | 4,338 |
| 15 | Millennium | 4,169 |
| 16 | DepotDownloader | 3,279 |
| 17 | SteamKit | 3,158 |
| 18 | steamtinkerlaunch | 2,832 |
| 19 | chiaki-ng | 2,605 |
| 20 | steam-rom-manager | 2,523 |
| 21 | ValveResourceFormat | 2,370 |
| 22 | TcNo-Acc-Switcher | 2,324 |
| 23 | valheim-server-docker | 2,239 |
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ReSharper brings a professional toolset for C# developers backed by over 20 years of experience, enterprise-grade security, SOC 2 compliance, and the trust of companies worldwide.
www.jetbrains.com