A cross-platform PSP emulator
Free and open source real-time strategy game
Cross-platform 2D and 3D game engine with modular architecture
OptiScaler bridges upscaling/frame gen across GPUs
Cross-Platform C++ 2D/3D game engine
Desktop/Android/HTML5/iOS Java game development framework
Mangos ZERO is a server for World of Warcraft
Open Source MMORPG Framework
Voxel game-creation platform with easy modding and game creation
Stream switch games to your PC via USB or network
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Classic 2D side-scrolling platformer game
Tool to statically recompile N64 games into native executables
Cocos simplifies game creation and distribution with Cocos Creator
Recreation of the classic Grand Theft Auto III game executable
Powerful, mature open-source cross-platform game engine for Python
Free game engine for development of desktop, mobile, and web games
Voxel game engine in C++ with OpenGL
Descent 3 by Outrage Entertainment
An unofficial PC port of the Xbox 360 version of Sonic Unleashed
The game engine for everyone
3D Procedural Game Engine Using OpenGL
Solar2D Game Engine main repository (ex Corona SDK)
A lightweight game server framework implemented with Actor Model
A free/open source client and automation tool for Ragnarok Online