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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.

  • Gen AI apps are built with MongoDB Atlas Icon
    Gen AI apps are built with MongoDB Atlas

    Build gen AI apps with an all-in-one modern database: MongoDB Atlas

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  • 1
    San Andreas Unity

    San Andreas Unity

    Open source reimplementation of GTA San Andreas game engine in Unity

    San Andreas Unity is an open-source reimplementation of GTA San Andreas game engine in Unity. This won't be a complete reimplementation, but the focus is on gameplay features, multiplayer, and creating a framework that will allow easy game extension and unlimited modding possibilities. When running for the first time, the game will ask you for a path to GTA installation. You need to own GTA in order to play it. The game is tested on Linux, Windows, Mac, and Android. It supports both Mono and IL2CPP scripting backends, so it can be built for any platform that Unity supports, provided that you can copy PC version of GTASA to target device. Game fully works in multiplayer. You can start the game as dedicated server, as a host (server & client at the same time), or you can connect to a server. This works on all supported platforms, which means you can start a host even on Android device.
    Downloads: 14 This Week
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  • 2
    Minecraft Console Client (MCC)

    Minecraft Console Client (MCC)

    Lightweight console for Minecraft chat and automated scripts

    Minecraft Console Client (MCC) is a lightweight cross-platform open-source Minecraft TUI client for Java edition that allows you to connect to any Minecraft Java server, send commands, and receive text messages in a fast and easy way without having to open the main Minecraft game.
    Downloads: 13 This Week
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  • 3
    C# SDL
    SDL.NET is a set of object-oriented .NET bindings for the SDL gaming library and provides high-level access to audio, keyboard, mouse, joystick, TTF fonts, various image formats, sound mixing, MPEG-1, and 2D video framebuffer.
    Downloads: 121 This Week
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  • 4
    Cryptic Roblox Executor For PC

    Cryptic Roblox Executor For PC

    Download Cryptic Roblox executor for keyless scripting. Free for PC.

    Cryptic Roblox Executor is a powerful, keyless script executor built for Roblox on PC. It allows users to safely and efficiently run custom Lua scripts in any Roblox game, unlocking new features, automation, and enhanced control over gameplay. Tested and benchmarked for top performance, Cryptic stands out from other free executors thanks to its clean UI, fast injection time, and support for most modern scripts. Following the discontinuation of our previous executor, Cryptic is now the official and recommended tool for all script users and developers in our community. Each version of Cryptic is directly published by trusted developers and scanned for safety before release. Our platform ensures a safe, secure, and ad-free download experience with no keys or verification links required. It's free, easy to use, and compatible with both beginners and advanced users. Whether you're automating farming in Blox Fruits or running GUIs in Pet Simulator X, Cryptic Executor gives you t
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    Downloads: 164 This Week
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  • The All-in-One Commerce Platform for Businesses - Shopify Icon
    The All-in-One Commerce Platform for Businesses - Shopify

    Shopify offers plans for anyone that wants to sell products online and build an ecommerce store, small to mid-sized businesses as well as enterprise

    Shopify is a leading all-in-one commerce platform that enables businesses to start, build, and grow their online and physical stores. It offers tools to create customized websites, manage inventory, process payments, and sell across multiple channels including online, in-person, wholesale, and global markets. The platform includes integrated marketing tools, analytics, and customer engagement features to help merchants reach and retain customers. Shopify supports thousands of third-party apps and offers developer-friendly APIs for custom solutions. With world-class checkout technology, Shopify powers over 150 million high-intent shoppers worldwide. Its reliable, scalable infrastructure ensures fast performance and seamless operations at any business size.
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  • 5

    Sims 3 Package Interface

    Sims 3 (and other) game package library

    "Sims 3 Package Interface" provides a core library of portable code that "understands" Sims3 game packages. Note that (with some minor tweaks) the core library code also understands other game package formats (e.g. SimCity Online, Sims4). Along with the core library are a number of "wrappers" that provide the main part of the project. These handle deserialization and serialization of data within the package (or any other source). Further tools (not supplied here) can use the core library and wrappers to manipulate the data content of package files. Note that development on this library and wrappers provided here has now finished.
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    Downloads: 289 This Week
    Last Update:
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  • 6
    Playnite

    Playnite

    Video game library manager with support for wide range of libraries

    Link games from Steam, Epic, Origin, GOG, Battle.net, Ubisoft Connect and other services, including games that are not installed! Playnite supports a wide variety of console emulators. Playnite's look can be fully customized, from simple color changes to complete layout re-designs. Playnite's functionality can be extended with plugins and script extensions. Fullscreen mode with full controller support is available. Playnite tracks your time in-game (any game including emulated ones). Playnite's user interface is fast and light on resources, even with large libraries. Playnite can run from portable storage without the need of installing system dependencies. No Playnite features are locked behind a paywall and the complete source code is available under the MIT license. Playnite doesn't store any user information on remote servers. All information about your library is stored locally on your PC.
    Downloads: 10 This Week
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  • 7
    Better Genshin Impact

    Better Genshin Impact

    UI Automation Testing Tools For Genshin Impact

    Better‑Genshin‑Impact (BetterGI) is an open‑source automation toolkit for Genshin Impact, enabling UI automation to perform actions such as auto‑pickup, auto‑quests, fishing, soul‑summoning, logging, mining, continuous gameplay, and rhythm‑game completion. It greatly simplifies repetitive tasks within the game. Auto‑fishing with day/night switching AI. Rhythm‑game automation (auto‑complete music challenges). Keyboard/mouse macro recording and playback for custom automation.
    Downloads: 9 This Week
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  • 8
    Pokemon Unity

    Pokemon Unity

    A framework to build Pokémon RPG games

    A framework to build Pokémon RPG games. I use IIcolour Spectrum's original Pokemon Unity as a base with Herbertmilhomme's framework. So far, this project use wrapper ( Legacy <=> Framework ), and in the future, I want to remove the wrapper. This project is playable, but it has some issues and some features are disabled. Use Unity Hub or Editor to import this project's folder (/Pokemon Unity). Build and run the project. There are also demos for Windows, Linux, and Mac zipped in Releases!
    Downloads: 9 This Week
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  • 9
    XCharts

    XCharts

    A charting and data visualization library for Unity

    A charting and data visualization library for Unity. Unity data visualization chart plugin. A UGUIpowerful, easy-to-use, parameter-configurable data visualization chart plug-in. It supports ten built-in charts. A powerful, easy-to-use, configurable charting and data visualization library for Unity. Visual configuration of parameters, real-time preview of effects, and pure code drawing without additional resources. Support ten built-in charts such as line chart, column chart, pie chart, radar chart, scatter chart, heat map, ring chart, candlestick chart, polar coordinate, parallel coordinate and so on. Supports 3D column charts, funnel charts, pyramids, dashboards, water level charts, pictographic column charts, Gantt charts, rectangular tree charts and other extended charts. Line graphs such as line graphs, curve graphs, area graphs, and stepped line graphs are supported.
    Downloads: 9 This Week
    Last Update:
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  • Simple, Secure Domain Registration Icon
    Simple, Secure Domain Registration

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  • 10
    RocksmithToTab

    RocksmithToTab

    Exports Rocksmith 2014 songs to Guitar Pro tabs

    Exports Rocksmith 2014 arrangements to Guitar Pro tabs (.gp5, .gpx). It parses Rocksmith's .psarc archives and converts any songs found within to tablature. All the Rocksmith techniques are supported and translated, and you get all of the chord diagrams and fingering hints that Rocksmith shows you. It's a great way to figure out specific parts of a song, and Guitar Pro's speed trainer is a very good alternative to the riff repeater. All arrangement types (bass, lead, rhythm) can be exported, either together in a single tab or into separate tabs.
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    Downloads: 54 This Week
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  • 11
    NeuralBot

    NeuralBot

    A general purpose aimbot, which uses a neural network for enemy/target

    NeuralBot is a general-purpose aimbot that utilizes neural networks for enemy or target detection. Unlike traditional aimbots that may interact directly with game memory, NeuralBot functions as a "pixel bot," analyzing on-screen pixels to identify targets. This approach makes it versatile across various first-person shooter games without modifying game files.
    Downloads: 8 This Week
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  • 12
    OpenRA Game Engine

    OpenRA Game Engine

    Open Source real-time strategy game engine for early Westwood games

    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. Updated gameplay designed around modern features like attack-move, unit veterancy, and the fog of war. Online play with full support for mods and custom maps. Updated campaigns with new objectives and difficulties. Natively supported on Windows, macOS and Linux. Fully open source and developed in the open with community input into updates and balance. User created and curated maps. Includes a Mod SDK to create new RTS games. Regular community streams and tournaments. One highlight feature is the new hierarchical pathfinder, which massively increases performance on large or more complex maps. Our new netcode brings major improvements to multiplayer. Your games should feel much smoother and units more responsive in both low and high latency settings.
    Downloads: 7 This Week
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  • 13
    Pinta

    Pinta

    Simple GTK# Paint Program

    Pinta is a free, open-source program for drawing and image editing. Its goal is to provide users with a simple yet powerful way to draw and manipulate images on Linux, Mac, Windows, and BSD. Use easy drawing tools to draw freehand, lines, rectangles, ellipses, and more. Pinta includes over 35 adjustments and effects for tweaking your images. Use Pinta in your language. Pinta is at least partially translated into over 55 languages. Don't be afraid to experiment, Pinta tracks your full history so you can always undo. Use layers to help separate and group elements of your image for easy editing. Like docked windows? No problem. Floating windows? No problem. You can even mix and match. Original Pinta code is licensed under the MIT License, see license-mit.txt for the MIT License. Code from Paint.Net 3.36 is used under the MIT License and retains the original headers on source files.
    Downloads: 7 This Week
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  • 14
    Oblivion Works
    Wrye Bash has moved to Github! Downloads: https://github.com/wrye-bash/wrye-bash/releases Code: https://github.com/wrye-bash/wrye-bash
    Downloads: 33 This Week
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  • 15
    Depressurizer

    Depressurizer

    A Steam library categorizing tool

    Depressurizer is a program aimed at making it a bit easier to manage large Steam game libraries. It can auto-categorize your games for you. Currently, it does so based on data from that game's Steam store pages. It can use genres, Steam flags (like "Single-Player" and "Steam Cloud"), Steam tags, Developer & Publisher info, How Long to Beat times, year, and/or Steam review user scores. Auto-categorizing can be done manually or automatically via shortcuts. In addition to providing a way to quickly and easily modify games' assigned categories, it also lets you mark them as favorites or as hidden. It also saves your configuration information independently of Steam, providing an automatic backup in the event that Steam loses your configuration. It must be run on the same computer on which you use Steam or one of the computers on which you use Steam. The first time you run Depressurizer, it will ask you for your Steam directory.
    Downloads: 6 This Week
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  • 16
    Netcode for GameObjects

    Netcode for GameObjects

    Netcode that provides networking capabilities to GameObject workflows

    Netcode for GameObjects is a Unity package that provides networking capabilities to GameObject & MonoBehaviour workflows. The framework is interoperable with many low-level transports, including the official Unity Transport Package. Visit the Multiplayer Docs Site for package & API documentation, as well as information about several samples which leverage the Netcode for GameObjects package. You can also jump right into our Hello World guide for a taste of how to use the framework for basic networked tasks. We’re evolving our solution, built on Netcode for GameObjects, in the open to become a netcode foundation that you can depend on – customizable and extensible to meet the needs of many multiplayer games types.
    Downloads: 6 This Week
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  • 17
    Minecraft Texture Studio

    Minecraft Texture Studio

    Easily create resource packs for Minecraft

    Easily create resource packs for minecraft. Program automatically detects your minecraft installation and imports the textures from minecraft allowing you to edit them easily, and import them into minecraft. You can also save your resource pack and give them them to friends, backup them up or post them online. Includes a 3D preview of all the blocks in minecraft and any changes you make to the textures is shown straight away on the preview
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    Downloads: 156 This Week
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  • 18
    Manic Digger is a public domain 3d block-building game similar to Minecraft.
    Downloads: 26 This Week
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  • 19
    Roblox Auto Clicker & Macro

    Roblox Auto Clicker & Macro

    Roblox but have auto clicker. Don't waste your time for click.

    Free auto clicker for Roblox. You don't need to click manually, let us do it for you. This program made by UfukGames and supporting 3 languages (Türkçe,Deutsch, English). You can use this program as an macro also. This program scanned before published.
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    Downloads: 73 This Week
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  • 20
    MisakaTranslator

    MisakaTranslator

    Galgame's Multilingual Real-time Machine Translation Tool

    MisakaProject is a collection of all projects developed based on MisakaTranslator or its auxiliary functions. If you are interested in adding your own projects of related types to MisakaProject, please contact the author. MisakaPatcher added support for plug-in Chinese patch, so this tool is more suitable for players who like manual translation, and also provides another way for Chinese personnel who have difficulty unpacking packets to release Chinese patch. MisakaHookFinder is suitable for some games where the translator can not be used to directly get the text hook method. Users can search for the hook special code by themselves or directly use it to get the source text. At the same time, it also supports the clipboard to output the original text.
    Downloads: 4 This Week
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  • 21
    XBox One Controller Battery Indicator

    XBox One Controller Battery Indicator

    Tray application that shows a battery indicator for an Xbox controller

    A tray application that shows a battery indicator for an Xbox-ish controller and gives a notification when the battery level drops to (almost) empty. It was originally written for the XBox One controller since Microsoft dropped all visual hints for low battery, but it should work with any gamepad that can be addressed via XInput (which should be all controllers that work in XBox-controller-enabled games). Download the link for a "ready to run" version at the bottom of this page(or under "Releases" in the side bar)! When more than one controller is present, the tray icon will cycle through the status display every 5 seconds.
    Downloads: 4 This Week
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  • 22
    Stratagus is a free cross-platform real-time strategy game engine, capable of playing against human or computer opponents, network or local. It can be used to build RTS games similar to C&C, WC2, AOE, and Tzar and runs under Linux, BSD, MacOS and Win
    Downloads: 27 This Week
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  • 23
    Basic Computer Games

    Basic Computer Games

    An updated version of the classic "Basic Computer Games" book

    Basic Computer Games is a modern revitalization of the classic “Basic Computer Games” book’s collection of games, ported and expanded into various modern, memory-safe and scripting languages. It includes illustrative code examples of many classic games (e.g. Blackjack, Bowling) in multiple languages, with the goal of making the historical games accessible and educational in safe modern environments. Definitely use the most recent versions and features of the target language, but also try to keep the code samples simple and explainable – the goal is to teach programming in the target language, not necessarily demonstrate the cleverest one-line tricks, or big system "enterprise" coding techniques designed for thousands of lines of code.
    Downloads: 3 This Week
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  • 24
    ClassicUO

    ClassicUO

    An open source implementation of the Ultima Online Classic Client

    ClassicUO is an open-source, modern client for Ultima Online, a beloved MMORPG originally released in the late 1990s. Designed as a drop-in replacement for outdated clients, ClassicUO supports high performance, modding, and quality-of-life improvements while preserving the game's core look and mechanics. It’s built using .NET Core and runs cross-platform, offering smoother input, faster rendering, and extensibility for private servers. The project is community-driven and continues to evolve in parallel with the fan-maintained ClassicUO ecosystem.
    Downloads: 3 This Week
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  • 25
    FNA

    FNA

    Accuracy-focused XNA4 reimplementation for open platforms

    FNA is a reimplementation of the Microsoft XNA Game Studio 4.0 Refresh libraries. FNA is primarily developed by video game porter Ethan Lee, who has shipped more than four dozen ports of XNA games using the exact branch that you see on GitHub today! You can see some examples of Steam games using FNA. A full list of FNA games on Steam can be found at this webpage. Developer documentation can be found on the FNA wiki, and player documentation can be found on the PCGamingWiki. Our goal is to preserve the XNA game library by reimplementing XNA itself, with an incredible focus on accuracy. We want to reproduce XNA as it was made by Microsoft, while providing an experience that feels "at home" on all of our target platforms. We don't use game-specific hacks in our code: either we do it right or we don't do it at all. Because our platform focus is exclusively on fully open platforms, our primary focus is on the desktop.
    Downloads: 3 This Week
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