Open Source C++ Games for Windows

An emulator for Gameboy and GameboyAdvance systems.

The continuing development of the legendary VBA gameboy advance emulator.

This is one of the most popular Doom source ports. It is available for DOS, Windows, Linux and Mac OS X, and should build on any POSIX platform which supports SDL. It enhances Doom with things like TCP/IP networking, OpenGL renderer, Heretic support and much more.

AMX Mod X is a Metamod plugin which allows you to write modifications for Half-Life with Small scripting language. It provides in-game administration tools, game statistics, server management and gameplay modificators. It is based on the original AMX Mod

OpenKore is a free and open source automation tool and custom client for the online game Ragnarok Online. It provides a flexible scripting system that allows users to automate gameplay, including navigation, combat, trading, and interaction with other players. The project supports plugins and modular extensions, enabling customization for different servers and play styles. OpenKore is cross-platform, running on Windows, Linux, and macOS, and is written primarily in Perl. With a strong community and extensive documentation, it is widely used by players and developers who want to explore automation, bot behavior, or server testing. The software emphasizes configurability, giving users control over character strategies and in-game decision-making.

Gens is a win32/unix Sega Genesis / Sega CD / Sega 32X emulator.

A MAME and MESS port with an advanced video support for Arcade Monitors, TVs, and PC Monitors. It also contains a bootable Linux LiveCD/USB, a frontend with animated MNG/MP3 snapshots, a rom manager, and recompression utilities for compressed files.

Electronic Arts Inc. has released the source code for Command & Conquer Red Alert under the GPL V3 license below, with additional terms at the bottom. This ZIP file is the full repository snapshot and includes source code for Command & Conquer Red Alert. This release provides support to the Steam Workshop for the game. Command and Conquer: Red Alert is a classic real-time strategy (RTS) game developed by Electronic Arts, with its source code available on GitHub for archival and preservation purposes. This repository offers tools to assist with compiling and running the game on modern platforms. It supports Steam Workshop integration, and while not currently accepting contributions, the repository serves as an open-source preservation project for the game. Developers interested in restoring the game or adapting it for new environments will find helpful dependencies and build tools outlined in the repository.

Vavoom is Doom/Heretic/Hexen/Strife source port. It features software, OpenGL and Direct3D rendering, VavoomC scripting language, slopes, 3D-floors, Quake style lighting engine, pure client/server architecture with in-game joining and a lots more.

Crystal Space is an Open Source 3D SDK for Unix, Windows, and MacOS/X. It renders with OpenGL and features GLSL shaders, CG shaders, deferred rendering, dynamic shadows, bullet based physics library, terrain engine, skeleton based animation meshes, exporter for Blender, portals, etc...

Cxbx is an Xbox emulator for WinNT (XP/2k/2003) computers. Turok Evolution is currently the only playable retail game.

Software Development Kit for the Nintendo(tm) Gameboy Advance(tm) based on GCC.

Daedalus is an established open-source Nintendo 64 emulator for Windows and the Sony PSP.

Mednafen is a portable, utilizing OpenGL and SDL, argument(command-line)-driven multi-system emulator.

FakeNES is a highly portable, Open Source NES and Famicom emulator. It runs on all modern operating systems and has an actively maintained DOS port for enthusiasts. Support for phones and other mobile platforms is under development. The majority of the project is entirely original code released under the zlib/libpng license. Contributed and third-party code is included under GNU licenses.

The Torque Network Library is a robust, secure, easy to use cross-platform C++ networking API designed for high performance simulations and games. The network architecture in TNL has powered some of the best internet multiplayer action games to date.

The Gates of Skeldal - Sources of the legendary game first released at 1998 by NapoleonGames. Sources are now under the GPL.          Brány Skeldalu, legendarní hra z roku 1998 od společnosti NapoleonGames. Zdrojáky jsou nyní pod GPL.

A shareware game called begin was released in 1984: a tactical starship game with a good AI and fair rules (the computer had no advantage) I've hacked assembly code to make it a multiplayer game, so that folk can challenge each other rather than the AI.

PSID64 is a program that converts PSID and RSID files into C64 executables. This allows users to play PSID and RSID files (originally used by the PlaySID program) on a real Commodore 64 computer or emulator such as VICE.

WinSTon is an Atari ST emulator running under Windows. Many programs and games are emulated very well but especially demos still behave strangely.

Gold City Game base from an original scenario. Best Sound, Picture , Animation, IA and Graphics. the camera is always placed so that the character is in the center of image in an adequate proportion

Dreamos is an operating system developed on Sega Dreamcast to be ported to an array of embedded devices. The goal of the project is to be able to run non-ported Unix programs on the Sega Dreamcast and other embedded devices with ease and POSIX compliance

Game software for emulating an EverQuest server

This project is the development of an open source fully emulated Darkfall Online Server and reverse engineering the proprietary game engine that DFO uses, the SF3D engine as well as its source code.

Aleph One is a highly sophisticated program for generating fractals. Some major features are: A built-in expression generator, 32-bit colouring schemes for the fractals, multi-threaded and multi-server rendering! WOW! And lots, lots more... The source code has moved to GitLab: https://gitlab.com/jmmcg/alephone