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Top 23 C# Game development Projects
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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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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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unity-mcp
Unity MCP acts as a bridge between AI assistants and your Unity Editor. Give your LLM tools to manage assets, control scenes, edit scripts, and automate tasks within Unity.
Community projects, like those from CoplayDev and CoderGamester, focus on speed and flexibility. They expose many parts of the Unity editor as MCP tools, which makes them great for experimentation and fast iteration.
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https://pixieditor.net/
Free and open source and, as far as I can tell, does everything this is claiming to do and more. It's part of our workflow for the game my son and I are making.
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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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Silk.NET
The high-speed OpenGL, OpenCL, OpenAL, OpenXR, GLFW, SDL, Vulkan, Assimp, WebGPU, and DirectX bindings library your mother warned you about.
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OpenTK
The Open Toolkit library is a fast, low-level C# wrapper for OpenGL, OpenAL & OpenCL. It also includes windowing, mouse, keyboard and joystick input and a robust and fast math library, giving you everything you need to write your own renderer or game engine. OpenTK can be used standalone or inside a GUI on Windows, Linux, Mac.
Project mention: Fast, portable, low-level C# bindings for OpenGL, OpenGL ES, OpenAL, and OpenCL | news.ycombinator.com | 2025-11-26 -
SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
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Unity-MCP
AI Skills, MCP Tools, and CLI for Unity Engine. Full AI develop and test loop. Use cli for quick setup. Efficient token usage, advanced tools. Any C# method may be turned into a tool by a single line. Works with Claude Code, Gemini, Copilot, Cursor and any other absolutely for free. (by IvanMurzak)
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YarnSpinner
The core compiler and engine-agnostic components for Yarn Spinner, the friendly dialogue tool.
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mcp-unity
Model Context Protocol (MCP) plugin to connect with Unity Editor — designed for Cursor, Claude Code, Codex, Windsurf and other IDEs
Community projects, like those from CoplayDev and CoderGamester, focus on speed and flexibility. They expose many parts of the Unity editor as MCP tools, which makes them great for experimentation and fast iteration.
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Arch
A high-performance C# based Archetype & Chunks Entity Component System (ECS) with optional multithreading.
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RuntimeUnityEditor
In-game inspector and debugging tools for applications made with Unity3D game engine
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NSMB-MarioVsLuigi
Standalone Unity remake of New Super Mario Bros DS' multiplayer gamemode, "Mario vs Luigi"
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DotRecast
DotRecast - a C# port of Recast & Detour, Industry-standard navigation mesh toolset for .NET, Unity3D, games, servers
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hedera
paint 3D ivy in the Unity Editor, watch procedurally generated meshes simulate growth and clinging in real-time
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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).
C# Game development discussion
C# Game development related posts
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MonoGame: A .NET framework for making cross-platform games
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Unity's Mono problem: Why your C# code runs slower than it should
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Lumix - a .NET open source ableton like DAW
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From Gaming to Healthcare: AI Research in My Master’s Journey
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How to Decide Which Engine is Right for You
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Finally Contributing Actual Code to Open Source
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Quick Start Guide to Stride Community Toolkit Preview: Code-Only Feature for C#/.NET Developers 🚀
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A note from our sponsor - ReSharper
www.jetbrains.com | 11 Jun 2026
Index
What are some of the best open-source Game development projects in C#? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | MonoGame | 13,976 |
| 2 | unity-mcp | 10,377 |
| 3 | PixiEditor | 7,753 |
| 4 | Stride Game Engine | 7,631 |
| 5 | Entitas | 7,627 |
| 6 | Silk.NET | 5,072 |
| 7 | OpenTK | 3,518 |
| 8 | UnrealCLR | 3,300 |
| 9 | Unity-MCP | 3,105 |
| 10 | YarnSpinner | 2,800 |
| 11 | Veldrid | 2,655 |
| 12 | MyBox | 2,190 |
| 13 | mcp-unity | 1,749 |
| 14 | Arch | 1,731 |
| 15 | LLMUnity | 1,632 |
| 16 | Svelto.ECS | 1,358 |
| 17 | buildtool | 1,340 |
| 18 | FontainebleauDemo | 1,170 |
| 19 | RuntimeUnityEditor | 1,085 |
| 20 | NSMB-MarioVsLuigi | 1,059 |
| 21 | DotRecast | 892 |
| 22 | hedera | 805 |
| 23 | OpenKCC | 775 |
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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.
www.jetbrains.com