Open Source C Games
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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.
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DOSBox
An Open Source DOS emulator to run old DOS games
DOSBox emulates a full x86 pc with sound and DOS. Its main use is to run old DOS games on platforms which don't have DOS (Windows 7, 8, 8.1 and 10 / Linux / FreeBSD / Mac OS X) -
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libsdl-android
SDL library for Android, including several games.
Port of SDL library to Android mobile platform. There are also several games inside the repository, along with their sources and build files. Both SDL 1.2 and 1.3/2.0 versions are supported (1.3/2.0 support is experimental) Sources are at https://github.com/pelya/commandergenius -
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This project was originally designed to provide an open-source replacement for PPJoy. The product, at this point, consists of virtual joystick devices that is seen by the system as a standard joystick but its position-data is written to it by a feeder application. An existing feeder application that takes advantage of this product is SmartPropoPlus. If you are an application writer you can very easily write an application that controls a joystick (e.g. mouse-to-joystick, keyboard-to-joystick). If you are a beginner in device drivers you can take this code and enhance it to support more (or less) axes, buttons or POVs.
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DsHidMini
Virtual HID Mini-user-mode-driver for Sony DualShock 3 Controllers
DsHidMini is an open-source Windows driver project designed to modernize support for Sony DualShock 3 controllers on Windows 10 and 11 systems. The software replaces outdated or incompatible drivers by exposing the controller as configurable HID devices compatible with DirectInput, Raw Input, HID APIs, and optional XInput emulation for modern games. It supports both wired USB and Bluetooth connectivity through integration with the companion BthPS3 stack, enabling low-latency wireless gameplay and automatic pairing workflows. The project includes multiple emulation modes, such as native DualShock 3 behavior, DualShock 4 emulation for DS4Windows compatibility, and Xbox-style XInput support for broader game compatibility. DsHidMini also offers customization features for LEDs, rumble, dead zones, battery indication, and controller behavior through a dedicated configuration utility. -
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OpenSource OpenGL Multiplayer Multiplatform Battle Zone capture the Flag. 3D first person tank game. Download the latest version at https://www.bzflag.org/downloads/ Development has moved to Github: https://github.com/BZFlag-Dev/bzflag (The SourceForge binary releases for Windows and macOS are very outdated. Please download the latest version from our website.)
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Stellarium
A planetarium software that shows a 3D simulation of the night sky
Stellarium renders 3D photo-realistic skies in real time with OpenGL. It displays stars, constellations, planets, nebulae and others things like ground, landscape, atmosphere, etc. -
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Warzone 2100
RTS game with the theme of Strategy by Design
You command the forces of “The Project” in a battle to rebuild the world after mankind has almost been destroyed by nuclear missiles. The game offers a full campaign with optional (but strongly recommended!), videos, battle against four factions, multi-player and single-player skirmish modes, and an extensive tech tree and a full unit designer. Multi-player is also cross-platform, battle your friends with any OS, Windows, Linux or Mac, it all works seamlessly! We also offer 100% portable Windows builds, take the game and install it anywhere! Our source repo is now at https://github.com/Warzone2100/warzone2100 Warzone 2100 works on both 32 & 64 bit Windows 7 or higher, 32 or 64 bit Linux, & macOS 10.14+. -
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Scid vs. PC
Chess Database and Toolkit program
"Shane's Chess Information Database" is a huge chess toolkit with extensive database, analysis and chess-playing features. Scid vs. PC is a usability and bug-fix fork of Scid. It has many interface fixes and improvements, and is fully compatible with Scid's .si4 databases. New features include a rewritten Gamelist, Computer Tournament, and FICS, Tree, Book and Graph improvements. -
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USBLoaderGX
Game backup loader for Wii and vWii
USBLoaderGX is a GUI for Waninkoko's USB Loader, based on libwiigui. It allows listing and launching Wii games, Gamecube games and homebrew on Wii and WiiU vWii mode. Its interface, based on the official theme from Nintendo Wii, is easy to use and perfect for kids and all the family. ATTTENTION, THIS PROJECT IS NOT MAINTAINED HERE ANYMORE. USBLoaderGX last version on sourceforge is 1272 (last stable 1271). Any bug reports or requests posted here will be ignored. This project has been copied to github, and any developers can now update and release new versions. Newer versions are available, maintained by other developers. If you need help, want to ask any questions or want to download newer versions (1280+), then you can find a project's branch maintained by Blackb0x here: https://gbatemp.net https://gbatemp.net/posts/8856063 https://github.com/wiidev/usbloadergx Thank you for your support all these years. Cyan -
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hekate
A GUI based Nintendo Switch Bootloader
hekate is a custom graphical bootloader for the Nintendo Switch that enables advanced system control, firmware patching, and multi-environment boot management for both official and custom operating systems. It functions as a powerful entry point for launching different firmware configurations, including stock firmware, custom firmware, Linux distributions, and Android builds, all from a unified interface. The bootloader features a touchscreen-enabled graphical user interface called Nyx, allowing users to navigate options, manage configurations, and execute tools directly from the device. It provides advanced storage management capabilities such as backing up and restoring eMMC data, managing emulated NAND environments, and partitioning SD cards for multiple operating systems. hekate also includes utilities for hardware diagnostics, benchmarking, and system inspection, offering detailed insights into device components like memory, battery, and storage. -
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Klavaro Touch Typing Tutor
A very efficient tutor.
A touch typing tutor very flexible, supporting customizable keyboard layouts. You can edit and save new or unknown keyboard layouts, as the basic course was designed to not depend on specific ones. Also, there are some charts about the learning process. -
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A port of The Ur-Quan Masters, using SDL, targetted for Linux, all BSD, Windows, MacOS X, and other SDL-supported platforms.
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raylib
A simple and easy-to-use library to enjoy videogames programming
raylib is highly inspired by Borland BGI graphics lib and by XNA framework. Do you want to see all functions available in raylib? Check raylib cheatsheet. raylib is a programming library to enjoy videogames programming; no fancy interface, no visual helpers, no auto-debugging, just coding in the most pure spartan-programmers way. raylib has received several recognitions in the last years and many people have written about the library. Here there are the main awards received from Google and Epic Games. raylib supports multiple target platforms, it has been tested in the following platforms but, technically, any platform that supports C language and OpenGL graphics is valid for raylib or can be very easily ported to. raylib can be combined with several extra libraries for additional functionality, some of those libraries are already used internally while others are provided for user integration, most of these libraries are single-file header-only with no external dependencies. -
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Luma3DS
Noob-proof (N)3DS Custom Firmware
Luma3DS is a program to patch the system software of (New) Nintendo (2)3DS handheld consoles "on the fly", adding features such as per-game language settings, debugging capabilities for developers, and removing restrictions enforced by Nintendo such as the region lock. It also allows you to run unauthorized ("homebrew") content by removing signature checks. To use it, you will need a console capable of running homebrew software on the Arm9 processor. Since v8.0, Luma3DS has its own in-game menu, triggerable by L+Down+Select. -
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Freeciv is a free turn-based multiplayer strategy game, in which each player becomes the leader of a civilization, fighting to obtain the ultimate goal: to become (or subvert) the greatest civilization.
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Xash3D FWGS Engine
Xash3D FWGS engine
Xash3D FWGS is an open-source fork and extension of the original GoldSrc-based engine (from the classic era of first-person shooters), aimed at providing compatibility with the original engine (e.g. games built on it) while extending and modernizing its capabilities. The engine supports multiple rendering backends (OpenGL, GLES, software fallback), modern platforms (desktop OSes, mobile, etc.), and updated features such as better multiplayer, voice chat, IPv6 support, improved virtual filesystem, and support for modern asset formats. For modders or fans of classic games, Xash3D FWGS offers a way to play or build games using the familiar GoldSrc workflow but with updated portability and features. Legacy mods and maps for supported games can often be used unchanged (or with minimal modifications), preserving the classic experience. At the same time, the engine’s enhancements — modern input support (gamepad, touch), modern OS compatibility, cross-platform builds. -
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The Ur-Quan Masters HD MegaMod
A standalone UQM mod made to enhance gameplay and visuals
The Ur-Quan Masters HD MegaMod is standalone mod of The Ur-Quan Masters that remasters HD-mod with a veritable smorgasbord of extra features and options. -
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QuakeSpasm
A modern, cross-platform Quake game engine based on FitzQuake.
QuakeSpasm is a *Nix friendly Quake Engine based on the SDL port of the popular FitzQuake. It includes some new features, important fixes, and aims for portability and 64 bit correctness. -
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Ultimate Edition
An Ubuntu remix for both new and experienced Linux sophisticates
Ultimate Edition Linux, previously "Ubuntu Ultimate Edition". We cater to a large base of *nix users including, but certainly not limited to gamers & low resource computers. We have a Ultimate Edition for virtually any user. -
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Quake III Arena
Quake III Arena GPL Source Release
Quake-III-Arena is the legendary first-person shooter originally released in 1999, and this repository holds its GPL-licensed source code release. By making the engine code fully open under GPL-2.0 (with licensing details regarding some bundled libraries like zlib), it allows the community to build, port, and maintain the engine, ensuring that the game remains playable even decades later. The release includes all major game subsystems: rendering, physics, network code, game logic, and tools (map compilation, asset packing, etc.), enabling full builds on Windows, Linux, macOS — assuming you provide the original game assets. Because the source is available, there are many community forks and improved engine builds (and ports) that modernize graphics, compatibility, input, mod support, and add enhancements while preserving core gameplay. The GPL-based release also enables modders and developers to study and extend the engine for learning, custom mods, or even entirely new games. -
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ZSNES is a SNES/Super Famicom emulator for x86 computers. It runs on Windows, MS-DOS and Linux/FreeBSD and supports mode 7, sound, Super FX, and a lot more.
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"Tux, of Math Command" is a math drill game starring Tux, the Linux Penguin. Lessons are included from simple number typing through addition, subtraction, multiplication, and division of positive and negative numbers. It is intended for kids ~4-10.
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OpenArena
Free and open source FPS based on Quake III Arena
OpenArena aims to be a free, yet compatible clone of Quake III Arena. It also strives to add subtle enhancements such as new gametypes, playermodels and of course maps! Further improvements are incorporated by using the ioquake3 engine. -
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SmartPropoPlus - Turning your R/C transmitter into a Flight Simulator Joystick
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2025 UPDATE: we have finally moved to Git! https://forge.a-lec.org/speed-dreams/speed-dreams-code/ This SourceForge project will be kept as a read-only archive and will be eventually removed! Speed Dreams is a Motorsport Simulator featuring high-quality 3D graphics and an accurate physics engine, all targeting maximum realism. Initially forked from TORCS, it has now reached a clearly higher realism level in visual and physics simulation, thanks to its active development team and growing community. It mainly aims to implement exciting new features, cars, tracks and AI opponents to make a more enjoyable game for the player, while constantly pushing forward visual and physics realism. It is also intended for any research, study or teaching activity, around physics and AI, thanks to its GPL V2+ license, and the clear and modular architecture of its C/C++ code base.
