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

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  • 1
    Steam Achievement Manager

    Steam Achievement Manager

    A manager for game achievements in Steam

    Steam Achievement Manager is a lightweight, portable desktop application designed to give users direct control over achievements and statistics associated with their Steam games. It works by interfacing with the Steam client and APIs, allowing users to unlock, relock, or modify achievements without needing to launch the actual game. The tool provides a simple interface where users can browse their game library, select a title, and view all available achievements in a structured format. Because it operates independently of the game itself, it is often used to recover bugged achievements, reset progress, or manage completion status across different titles. The application requires Steam to be running and the user to be logged in, ensuring that changes are applied directly to the account’s achievement data. Its portability means it can be run without installation, making it convenient for quick use across systems.
    Downloads: 111 This Week
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  • 2
    Monke Mod Manager

    Monke Mod Manager

    Mod Installer for the PC version of Gorilla Tag

    MonkeModManager is a mod management tool created for games within the Gorilla Tag ecosystem, providing users with an easy way to install, update, and manage mods without manual file handling. The application simplifies the modding process by offering a graphical interface where users can browse available mods and apply them with minimal effort. It automatically handles file placement, dependency management, and compatibility checks, reducing the risk of user error. The manager also supports updating mods, ensuring that users always have access to the latest versions without needing to track changes manually. Designed with accessibility in mind, it allows even non-technical users to customize their gameplay experience. It also includes safety mechanisms to help prevent issues such as corrupted installations or incompatible mod combinations.
    Downloads: 86 This Week
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  • 3

    Irrlicht Engine

    3D Engine c++

    The Irrlicht Engine is an open source high performance realtime 3D engine written and usable in C++. It is completely cross-platform, using D3D, OpenGL and its own software renderers.
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    Downloads: 387 This Week
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  • 4
    NVIDIA Profile Inspector

    NVIDIA Profile Inspector

    Modify game profiles inside the internal driver database

    NVIDIA Profile Inspector is a specialized utility that allows users to view and modify hidden graphics driver settings within NVIDIA’s internal profile database, providing deeper control than the official NVIDIA Control Panel. It exposes advanced and undocumented configuration options that can influence rendering behavior, performance optimization, and compatibility for specific games. Users can create, edit, and assign profiles for individual applications, enabling fine-grained tuning of GPU behavior beyond standard settings. The tool is particularly popular among enthusiasts who want to optimize performance, troubleshoot graphical issues, or enable experimental features such as custom DLSS configurations. It provides a detailed interface for browsing and editing driver parameters, making it possible to adjust settings that are otherwise inaccessible.
    Downloads: 60 This Week
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  • 5
    S&box

    S&box

    s&box is a modern game engine, built on Valve's Source 2

    S&box is the open-source codebase for s&box, a next-generation sandbox game development platform from the creators of Garry’s Mod that blends modding freedom with modern tooling and performance. Built on a cutting-edge game engine, s&box allows creators to prototype, build, and share interactive game modes, tools, and environments using C#, JavaScript, and visual scripting, promoting accessible content creation for developers of varying skill levels. The platform emphasizes multiplayer and community experiences, giving creators direct control over networking, physics, rendering, and audio without needing to build those systems from scratch. With real-time recompilation and fast iteration loops, developers can see changes instantly, speeding up the creative process dramatically compared to traditional engines. The sbox ecosystem fosters collaboration, sharing, and extension through packages and community content, enabling a vibrant marketplace of user-created mods and assets.
    Downloads: 59 This Week
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  • 6
    Script Hook V .NET (SHVDN)

    Script Hook V .NET (SHVDN)

    An ASI plugin for Grand Theft Auto V

    ScriptHookVDotNet is an open-source scripting framework for Grand Theft Auto V that enables developers to create and run custom scripts using languages such as C# and VB within the game environment. It acts as a bridge between the game engine and managed code, allowing modders to interact with game systems through a structured and object-oriented API. Built on top of the original Script Hook V, it simplifies the scripting process by providing higher-level abstractions and reducing the need to work directly with low-level native functions. The framework supports real-time script execution and reloading, enabling developers to test and iterate on their modifications without restarting the game. It also includes an in-game console and debugging capabilities, making development more efficient and interactive. ScriptHookVDotNet is widely used in the GTA V modding community to create custom gameplay mechanics, tools, and enhancements.
    Downloads: 42 This Week
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  • 7
    NitroType Cheat v2

    NitroType Cheat v2

    An easy-to-use, working NitroType hack for typing at insane speeds!

    NitroType Cheat v2 is a browser-based or script-driven tool designed to automate typing performance in the Nitro Type online racing game by simulating extremely high typing speeds and accuracy. It works by intercepting or generating input events that mimic rapid and precise keystrokes, allowing users to achieve unrealistically high words-per-minute scores. The project is built for ease of use, often requiring minimal setup or configuration to begin automating gameplay. It demonstrates how client-side input manipulation can influence outcomes in browser-based games that rely on user input validation. While it provides a clear advantage in gameplay, it also highlights potential vulnerabilities in systems that do not enforce strict server-side validation of user actions. The tool is primarily intended for experimentation or demonstration rather than legitimate competitive use.
    Downloads: 26 This Week
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  • 8

    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: 493 This Week
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  • 9
    The Open Toolkit is an advanced, cross-platform, C# OpenGL, OpenAL and OpenCL wrapper for Mono/.Net. It is especially suitable to RAD development and can be used in games, GUIs (WinForms, WPF, GTK#) and scientific applications. The official repository can be found in github: https://github.com/opentk/opentk The sourceforge repository will no longer be updated, but will remain online for posterity.
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    Downloads: 81 This Week
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  • 10
    Ares
    Ares stands for Aural RPG Experience System. It is used to create and play music lists, background sounds or special sound effects for different situations during (pen & paper) role-playing.
    Downloads: 33 This Week
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  • 11
    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.
    Leader badge
    Downloads: 28 This Week
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  • 12
    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
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  • 13
    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: 6 This Week
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  • 14

    coldev

    C/C++ , PHP, PYTHON, 3D ENGINES, CHROME NATIVE CLIENT

    + C/C++ and PHP projects, Python and Others + 3D ENGINES + Videogames Projects based in Bennugd http://www.bennugd.org Web Page https://coldev.sourceforge.io/
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    Downloads: 24 This Week
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  • 15
    A easy basic in order to make games in 2d style amos for linux and windows The basic it comprises a module runtime, ide examples and games.
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    Downloads: 21 This Week
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  • 16
    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: 5 This Week
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  • 17
    OpenArena is a 3d game creation engine. It is a rendering system that can be used for more than just games but it is targeted at games. The basic use being create some game media textures models maps and config files for physics and rules.
    Downloads: 13 This Week
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  • 18
    Scrolling Game Development Kit 2
    All-in-one program for creating 2D scrolling games. Compile your games into stand-alone .NET executables or customizable C# source code. The IDE and framework are build on OpenTK, which wraps OpenGL, so generated games can be cross-platform.
    Downloads: 3 This Week
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  • 19
    Vocaluxe
    Vocaluxe is an open source singing game inspired by SingStar™ and Ultrastar Deluxe. The code is hosted on github: https://github.com/Vocaluxe/Vocaluxe
    Downloads: 11 This Week
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  • 20
    The GK3 Tools project is a collection of tools and utilities useful for viewing and modifying the Gabriel Knight 3 data files.
    Downloads: 10 This Week
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  • 21
    LocoNet over TCP
    Client-server based software that talks to Digitrax LocoNet. TCP server talks through a hardware interface (e.g. LocoBuffer) to LocoNet. (User interface) clients talk to that server.
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    Downloads: 8 This Week
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  • 22
    Flappy Tux

    Flappy Tux

    Penguins can't fly? You've never been so wrong!

    This is a clone of the popular "Flappy Bird"-Game playable on Windows, Linux and Mac. Main actor is the linux-mascot Tux and with the nice graphics known from "SuperTux" you feel at home from the beginning. Help Tux to avoid all the pipes by using only one button. But beware: This game is harder than it looks. With your help, penguins CAN fly!
    Downloads: 4 This Week
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  • 23
    Cygwin Ports

    Cygwin Ports

    Repository of desktops and programs for the Cygwin platform

    A large repository of open-source programs built for Cygwin, including X11 desktops, language interpreters, multimedia frameworks, cross-compiler toolchains, and much more. Also hosted here is the cygport tool for building Cygwin packages. cygport releases and the Ports Git repositories are hosted here; Ports packages are available from the website.
    Downloads: 1 This Week
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  • 24
    Icarus Scene Engine

    Icarus Scene Engine

    3D .NET engine for Windows, Linux, Mac

    Icarus Scene Engine is a cross-platform, CLS-compliant 3D framework, integrating open source APIs into a cohesive all-open-source, all .NET solution. For Windows, MacOSX & Linux. Uses OpenTK, OpenGL, OpenAL APIs for graphics and audio. Runs on Mono/.NET. Links to FFMpeg for streaming video, and FreeType as a temporary conversion mod to bring fonts into a native XML format. Binary builds of Icarus will be infrequent, roughly every 18 months or so, the GIT code updates regularly on a weekly or twice-weekly basis (or faster if there are urgent issues).
    Downloads: 4 This Week
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  • 25
    open-dis

    open-dis

    Open-DIS implements the IEEE DIS protocol in multiple languages.

    An open source implementation of the Distributed Interactive Simulation (IEEE-1278) standard in C++, C-Sharp, Objective-C, Java, Javascript and XML. Example applications including sending and receiving native DIS traffic, X-Plane plugin, and WebSocket/Javascript/WebGL applications. See the individual code directories for each package of interest. This project is inactive and has migrated to a GitHub project at https://github.com/open-dis
    Downloads: 4 This Week
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