Scriptable Headless Browser

PlayStation 3 emulator and debugger

An open source re-implementation of RollerCoaster Tycoon 2 🎢

Luanti (formerly Minetest) is an open source voxel game-creation platform with easy modding and game creation

OpenTTD is an open source simulation game based upon Transport Tycoon Deluxe

Synchronous multiroom audio player

3D engine with modern graphics

The code base of supertuxkart

A generic post-processing injector for games and video software.

Fritzing desktop application

Half-Life 1 engine based games

A powerful free cross-platform RTS game engine. - Report issues at https://springrts.com/mantis/

Descent 3 by Outrage Entertainment

[DEPRECATED] Git mirror of the 0 A.D. SVN source code (migrated to https://gitea.wildfiregames.com on August 20th 2024)

SuperTux source code

Reverse Engineers' Hex Editor

Webcamoid is a full featured and multiplatform webcam suite.

Community effort to maintain and improve Jedi Academy (SP & MP) + Jedi Outcast (SP only) released by Raven Software

OpenRW "Open ReWrite" is an un-official open source recreation of the classic Grand Theft Auto III game executable

bsnes is a Super Nintendo (SNES) emulator focused on performance, features, and ease of use.

Open-source repository of Orbiter Space Flight Simulator

An open source re-implementation of Chris Sawyer's Locomotion

An open-source Tomb Raider 1-5 engine remake

openblack is an open-source game engine that supports playing Black & White (2001).

A reimplementation of BioWare's Aurora engine (and derivatives). Pre-pre-alpha :P

DirectX9 to DirectX12 API proxy for Guild Wars 2

Modern "Jedi Engine" replacement supporting Dark Forces, mods, and in the future Outlaws.

An FPS/RTS hybrid game powered by the Daemon engine (a combination of ioq3 and XreaL)

Unreal Tournament Engine Reimplementation