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Top 23 C# Game Projects
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2. osu!
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InfluxDB
InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
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OpenRA
Open Source real-time strategy game engine for early Westwood games such as Command & Conquer: Red Alert written in C# using SDL and OpenGL. Runs on Windows, Linux, *BSD and Mac OS X.
OpenRA did it better :D
If you haven't seen it yet https://www.openra.net/ is worth your time.
https://github.com/OpenRA/OpenRA
I have many fond memories of playing openra as "LAN" game on the "gaming weekends" from a few FOSS groups I've been in. Can't recommend "saturday gaming" enough to anyone involved in any foss community.
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MonoGame: https://www.monogame.net/
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Entitas
Entitas is a super fast Entity Component System (ECS) Framework specifically made for C# and Unity
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Project mention: Quick Start Guide to Stride Community Toolkit Preview: Code-Only Feature for C#/.NET Developers 🚀 | dev.to | 2024-09-23
The Stride Community Toolkit is a collection of extensions and helpers designed for the Stride C# game engine. This open-source, community-driven project simplifies the process of creating 2D/3D games, especially using its code-only feature, which allows developers to build games without relying on Game Studio.
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SaaSHub
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Project mention: Thrive is a free, open-source game about the evolution of life | news.ycombinator.com | 2025-03-17
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space-station-14
A multiplayer game about paranoia and chaos on a space station. Remake of the cult-classic Space Station 13.
Project mention: Space Station 14, an open source multiplayer video game | news.ycombinator.com | 2024-12-03 -
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> The other problem with simd is that in modern cpu-centric languages it often requires a rewrite for every vector width.
It does not: https://github.com/bepu/bepuphysics2/blob/master/BepuUtiliti...
Also you can’t go to GPU for most tasks SIMD is used in CPUs today. Good luck parsing HTTP headers with that.
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Barotrauma
A 2D online multiplayer game taking place in a submarine travelling through the icy depths of Jupiter's moon Europa.
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DLSSTweaks
Tweak DLL for NVIDIA DLSS, force DLAA on DLSS-supported titles, tweak scaling ratios & DLSS 3.1 presets, override DLSS versions without overwriting game files.
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OpenSAGE
OpenSAGE is a free, open source re-implementation of SAGE, the 3D real time strategy (RTS) engine used in Command & Conquer: Generals and other RTS titles from EA Pacific. Written in C#. Not affiliated with EA.
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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).
C# Game discussion
C# Game related posts
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MORT: Real-time game translator with OCR
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Thrive is a free, open-source game about the evolution of life
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Thrive is a free, open-source game about the evolution of life
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OpenRA – Classic strategy games rebuilt for the modern era
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Ask HN: Does retro computing make you feel younger or older?
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Space Station 14, an open source multiplayer video game
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WolvenKit code analysis: things to know before modding Cyberpunk 2077
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A note from our sponsor - SaaSHub
www.saashub.com | 13 May 2025
Index
What are some of the best open-source Game projects in C#? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | osu | 16,502 |
| 2 | OpenRA | 15,559 |
| 3 | MonoGame | 12,088 |
| 4 | Entitas | 7,329 |
| 5 | Stride Game Engine | 6,947 |
| 6 | open-project-1 | 5,875 |
| 7 | Hearthstone-Deck-Tracker | 4,833 |
| 8 | tModLoader | 4,491 |
| 9 | UnrealCLR | 3,199 |
| 10 | Facepunch.Steamworks | 3,160 |
| 11 | Thrive | 3,149 |
| 12 | space-station-14 | 3,068 |
| 13 | FNA | 2,752 |
| 14 | BEPUphysics | 2,550 |
| 15 | YarnSpinner | 2,474 |
| 16 | Nez | 1,891 |
| 17 | Barotrauma | 1,871 |
| 18 | Aurora | 1,840 |
| 19 | fungus | 1,787 |
| 20 | osu-framework | 1,756 |
| 21 | DLSSTweaks | 1,576 |
| 22 | OpenSAGE | 1,486 |
| 23 | Duality | 1,422 |
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