Browse free open source C# Games and projects below. Use the toggles on the left to filter open source C# Games by OS, license, language, programming language, and project status.

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  • 1
    Space Trader for Windows. A port to C# (.NET) of the popular game for Palm.
    Downloads: 10 This Week
    Last Update:
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  • 2
    Digital Paintball 3

    Digital Paintball 3

    3D FPS Digital Paintball 3 Multiplayer Online Game

    Digital Paintball 3 is a first person shooter (FPS) game available on Web, PC, Mac and Linux. Conflate your love for simulated sport with adventure, and what you will get is the best 3D, digital paintball 3 video game of all times! You can enjoy endless hours of pure joy and an assured excitement that gradually mounts without leaving the sanctity of your home or braving the detestation of getting wet or dirty. The new online game that we have developed so punctiliously is sure to leave you regaling to the extent that you will soon be hooked to it. One of the fastest paced multiplayer digital paintball, Paint-ball Online is a super way to exercise your mental prowess, hand-eye coordination, concentration, Digital Paintball 3 Online analytical knack, quick decision-making capabilities, and of course, your love digital paintball 3 for the actual sport. Carry the power in your hand, register at our site and feel the blues blow away.
    Downloads: 7 This Week
    Last Update:
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  • 3
    Sports Tactics Board is a utility that allows coaches, trainers and officials to describe sports tactics, strategies and positioning using a magnetic or chalk-board style approach. Supports soccer, hockey, volleyball and floorball.
    Downloads: 9 This Week
    Last Update:
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  • 4
    Stars! Nova
    Stars! Nova is a clone of the classic 4X space strategy game Stars!. While nowhere near the functionality of Stars! quite a few features have been implemented so far. See the Nova web page for details.
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    Downloads: 8 This Week
    Last Update:
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  • 5
    2D isometric MMORPG using the SDL framework. Daimonin offers a free public server at https://www.daimonin.org . A Unity client is also in active development.
    Downloads: 7 This Week
    Last Update:
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  • 6
    X Speed Race

    X Speed Race

    Drive the super fast cars and become the best driver out there.

    Drive the super fast cars to see if you can beat the other ones and become the best driver out there. Arrow keys to drive Space - handbrake V - camera view B - back camera R - reset car O - Options Menu M - Car Select Menu
    Downloads: 8 This Week
    Last Update:
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  • 7
    Borderless Gaming

    Borderless Gaming

    Make your windowed games Borderless Fullscreen

    Downloads: 36 This Week
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  • 8
    UnityGameTranslator

    UnityGameTranslator

    A free, open-source mod that lets you translate any Unity game

    A free, open-source mod that lets you translate any Unity game into any language. No API costs, no internet required for local AI. Share your translations and work in team.
    Downloads: 32 This Week
    Last Update:
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  • 9
    Dawn of Light

    Dawn of Light

    Dark Age of Camelot server emulator

    Sourceforge is discontinued, now on Github: https://github.com/Dawn-of-Light Framework for interacting with the Dark Age of Camelot client (Mythic, EA/Mythic, BioWare, Broadsword licensed). Also know as a Dark Age of Camelot ( DAoC ) Server Emulator. Give life to your own world ! Please consider playing live: http://www.darkageofcamelot.com
    Downloads: 6 This Week
    Last Update:
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  • 10
    An application that can extract, replace and view the files as cards, sound effects and music from the Yu Gi Oh! Power of Chaos PC games. It is written in C# .NET. Aplicación que puede extraer y manipular los archivos de YuGiOh Power of Chaos, cartas,et
    Downloads: 17 This Week
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  • 11
    SokoSolve Sokoban
    SokoSolve is a Sokoban game and enthusiast tools. Features include: Game (mouse-move,crate-drag, bookmarks), Library, Solver, Editor, and Generator. (Windows, C# .NET) Moved: https://github.com/guylangston/SokoSolve
    Downloads: 16 This Week
    Last Update:
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  • 12

    XNB Builder

    Create .xnb files for XNA games.

    Recently updated to fix an error where content would never be compressed. You should update to the latest version in order to fix this. Note: The full version of XNA game studio is required for conversion. See the ReadMe for details on where to download it. Create .xnb files for use in XNA games. This allows for .png to .xnb and more. Full list of supported filetypes: Graphics Files: *.bmp;*.dds;*.dib;*.hdr;*.jpg;*.pfm;*.png;*.ppm;*.tga Autodesk FBX Files: *.fbx Effects Files: *.fx SpriteFont Files: *.spritefont X Files: *.x XNA XML Files: *.xml Audio Files: *.mp3;*.wav;*.wma Video Files: *.wmv Support for some filetypes may be incomplete, graphics filetypes should all be fine. If there's an issue with converting a certain filetype, please let me know!
    Downloads: 8 This Week
    Last Update:
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  • 13
    Chess-Coding-Adventure

    Chess-Coding-Adventure

    A work-in-progress chess bot written in C#

    Chess Coding Adventure is an educational project that walks developers through the process of building a chess engine from scratch, focusing on understanding the underlying algorithms and logic. It is structured as a series of lessons or stages, each introducing key concepts such as move generation, board representation, and search algorithms. The project emphasizes learning by doing, encouraging users to implement features step by step rather than relying on prebuilt solutions. It also explores advanced topics such as evaluation functions and decision-making strategies. The code is designed to be clear and instructional, making it accessible to beginners while still offering depth for more experienced developers. It is often used alongside video tutorials that explain each step in detail. Overall, Chess Coding Adventure provides a comprehensive introduction to building game AI systems.
    Downloads: 1 This Week
    Last Update:
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  • 14
    Path-Creator

    Path-Creator

    Path creation asset for Unity game development

    Path Creator is a Unity tool that allows developers to design and manipulate smooth paths using Bezier curves for use in games and simulations. It provides an intuitive editor interface where users can create paths visually and adjust control points to shape curves precisely. The tool is widely used for tasks such as character movement, camera paths, and object animation along predefined routes. It supports features like automatic path smoothing, looped paths, and adjustable resolution for fine control over movement precision. The system also includes runtime functionality, enabling objects to follow paths dynamically during gameplay. It is designed to be both user-friendly and flexible, accommodating a variety of use cases. Overall, Path Creator simplifies the process of implementing path-based movement in Unity projects.
    Downloads: 1 This Week
    Last Update:
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  • 15
    Stride

    Stride

    Stride (formerly Xenko), a free and open-source cross-platform C# game

    Stride (formerly known as Xenko) is a full-featured, open-source game engine written in C# and targeting the .NET ecosystem, designed for both 2D and 3D games — and even VR experiences. Stride offers a comprehensive toolchain: an editor for scene building, asset management, a rendering pipeline with physically-based rendering (PBR), and support for advanced graphics features such as real-time reflections, post-processing effects, and complex materials (skin, hair, cloth, etc.). Because it’s built on modern C# and .NET, developers can take advantage of modern language features (C# 14, .NET 10), tooling (Visual Studio, VS Code, Rider), and long-term maintainability. The engine supports cross-platform development: you can build for desktop, mobile, or VR, and target multiple operating systems. Stride is modular and customizable: you can tailor rendering, physics, scripting, and other subsystems to suit your game’s needs.
    Downloads: 1 This Week
    Last Update:
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  • 16
    UniRx

    UniRx

    Reactive extensions for Unity

    UniRx (Reactive Extensions for Unity) is a reimplementation of the .NET Reactive Extensions. The Official Rx implementation is great but doesn't work on Unity and has issues with iOS IL2CPP compatibility. This library fixes those issues and adds some specific utilities for Unity. Supported platforms are PC/Mac/Android/iOS/WebGL/WindowsStore/etc and the library. Ordinarily, Network operations in Unity require the use of WWW and Coroutine. Rx cures that kind of "asynchronous blues". Rx is a library for composing asynchronous and event-based programs using observable collections and LINQ-style query operators. The game loop (every Update, OnCollisionEnter, etc), sensor data (Kinect, Leap Motion, VR Input, etc.) are all types of events. Rx represents events as reactive sequences which are both easily composable and support time-based operations by using LINQ query operators.
    Downloads: 1 This Week
    Last Update:
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  • 17
    UniTask

    UniTask

    Provides efficient allocation free async/await integration for Unity

    Provides an efficient allocation free async/await integration for Unity. Struct-based UniTask<T> and custom AsyncMethodBuilder to achieve zero allocation. Makes all Unity AsyncOperations and Coroutines awaitable. PlayerLoop-based task(UniTask.Yield, UniTask.Delay, UniTask.DelayFrame, etc..) that enables replacing all coroutine operations. MonoBehaviour Message Events and uGUI Events as awaitable/async-enumerable. Runs completely on Unity's PlayerLoop so doesn't use threads and runs on WebGL, wasm, etc. Asynchronous LINQ, with Channel and AsyncReactiveProperty. TaskTracker window to prevent memory leaks. Highly compatible behavior with Task/ValueTask/IValueTaskSource. In UniTask v2, almost everything is zero-allocated due to a thorough rewrite of the code (Technical details to follow). In addition to significant performance improvements, the new asynchronous sequences, and Asynchronous LINQ.
    Downloads: 1 This Week
    Last Update:
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  • 18
    osu!framework

    osu!framework

    A game framework written with osu! in mind.

    A game framework written with osu! in mind. If you are interested in creating a project using the framework, please start from the getting started wiki resources (or jump straight over to the project templates). You can either start off from an empty project, or take a peek at a working sample game. Either way, full project structure, cross-platform support, and a testing setup are included! This framework is intended to take steps beyond what you would normally expect from a game framework. This means things like basic UI elements, text rendering, advanced input handling (textboxes) and performance overlays are provided out-of-the-box. Any of the osu! code that is deemed useful to other game projects will live in this framework project. Anywhere we implement graphical components, they will be displayed with a generic design and will be derivable for further customization.
    Downloads: 1 This Week
    Last Update:
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  • 19
    Light.Web NovelReader

    Light.Web NovelReader

    A light or web novel reader app for desktop (windows)

    You can read your favourite light, web or wuxia novel on this application.
    Downloads: 14 This Week
    Last Update:
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  • 20
    Nebo.Mobi.Bot
    Бот для игры "Небоскребы" (http://nebo.mobi/) Бот создавался для помощи игрокам, которые не успевают выполнить задания Города в срок. Автор категорически против использования бота для получения превосходства над другими игроками. Помните, что вы используете его на свои страх, риск и совесть! Приятной игры! Инструкция: 1) Запустить файл Nebo.Mobi.Bot.exe; 2) Добавить необходимое количество персонажей; 3) Настроить режимы работы; 4) Нажать на кнопку "Старт".
    Downloads: 24 This Week
    Last Update:
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  • 21
    An open source starter package for creating Minecraft type games, using Unity 3 by Unity Technologies.
    Downloads: 6 This Week
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  • 22
    CDG Editor is a tool that allows the user to edit the contents of a CDG file (typically extracted from a karaoke disc as mp3+g). v1.3 now supports all CD+G command types. Please note that this is not a Karaoke creation or editing tools (see some of the comments below) - it is for fixing the CDG files that you have where the text is corrupt due to a poor rip from the original CD+G disk. You have to edit individual CD+G tile commands. This tool could be used to change the lyrics of a song for example, but it would be very difficult - that's not its purpose. Thanks for the feedback though. I've installed it on several Windows 7 64bit PCs but haven't tested the installer or the app on Windows 8 yet. Let me know via the support pages if you have problems and I'll see what I can do to help.
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    Downloads: 19 This Week
    Last Update:
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  • 23
    Roboships is a programming game, you must build and program 2-10 roboships to fight against each other. Ships can have different hulltypes and set of weapons. Programming is done with flowcharts and battles are fought in 2D sea.
    Downloads: 12 This Week
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  • 24
    D2D Map Editor enables the rapid creation of tile based map grids. It’s easy to learn and can be used by programmers and non-programmers alike. The maps generated can be deployed in games and applications developed in C++, C#, ActionScript and XML.
    Downloads: 6 This Week
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  • 25
    Save game editor for Master of Magic - the best game ever !
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    Downloads: 21 This Week
    Last Update:
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