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Top 23 C# Game Projects
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To avoid taking my word for it, let's explore these features using the source code of the well-known osu! project. This is one of the most popular open-source rhythm games with a large and dedicated community. We expected the code to be high-quality, but PVS-Studio analyzer still found potential issues. Using these examples, I'll demonstrate what static analysis tools can do.
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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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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.
Project mention: Ask HN: Which Do you know any open source games? | news.ycombinator.com | 2025-08-10 -
Project mention: MonoGame: A .NET framework for making cross-platform games | news.ycombinator.com | 2026-03-07
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Project mention: MonoGame: A .NET framework for making cross-platform games | news.ycombinator.com | 2026-03-07
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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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space-station-14
A multiplayer game about paranoia and chaos on a space station. Remake of the cult-classic Space Station 13.
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Project mention: MonoGame - A Game Engine for Those Who Love Reinventing the Wheel | dev.to | 2026-05-22
FNA - Another XNA Implementation
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YarnSpinner
The core compiler and engine-agnostic components for Yarn Spinner, the friendly dialogue tool.
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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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PrimeTween
PrimeTween is a high-performance, allocation-free animation library for Unity. Animate anything with just one line of code, tweak all animation properties directly from the Inspector, and create complex animation sequences. No runtime memory allocations, ever.
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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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Arch
A high-performance C# based Archetype & Chunks Entity Component System (ECS) with optional multithreading.
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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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MonoGame - A Game Engine for Those Who Love Reinventing the Wheel
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MonoGame: A .NET framework for making cross-platform games
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Interpreter – Offline screen translator for Japanese retro games
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Checking osu! and exploring features of static analyzers
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Stride Game Engine 4.3 With.net 10 Support
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Bepuphysics 2.4: The Fastest Physics Yet
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Helion: A modern fast paced Doom FPS engine in C#
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A note from our sponsor - SaaSHub
www.saashub.com | 13 Jun 2026
Index
What are some of the best open-source Game projects in C#? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | osu | 18,469 |
| 2 | OpenRA | 16,768 |
| 3 | MonoGame | 13,999 |
| 4 | Stride Game Engine | 7,645 |
| 5 | Entitas | 7,627 |
| 6 | open-project-1 | 6,038 |
| 7 | tModLoader | 5,380 |
| 8 | Hearthstone-Deck-Tracker | 4,900 |
| 9 | space-station-14 | 3,656 |
| 10 | Facepunch.Steamworks | 3,653 |
| 11 | Thrive | 3,564 |
| 12 | UnrealCLR | 3,300 |
| 13 | FNA | 2,996 |
| 14 | BEPUphysics | 2,891 |
| 15 | YarnSpinner | 2,800 |
| 16 | Barotrauma | 2,143 |
| 17 | Nez | 2,046 |
| 18 | osu-framework | 1,967 |
| 19 | fungus | 1,926 |
| 20 | PrimeTween | 1,907 |
| 21 | Aurora | 1,848 |
| 22 | DLSSTweaks | 1,742 |
| 23 | Arch | 1,731 |
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