A cross-platform PSP emulator
Desktop/Android/HTML5/iOS Java game development framework
A certain block game
Stream switch games to your PC via USB or network
UCI chess engine
Voxel game-creation platform with easy modding and game creation
The game engine for everyone
Cocos simplifies game creation and distribution with Cocos Creator
Home theater software and entertainment hub for digital media
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Solar2D Game Engine main repository (ex Corona SDK)
dhewm 3 main repository
Create custom themes for the Nintendo Switch
Open-source engine for Heroes of Might and Magic III
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Multi-platform 2D and 3D game engine
A game of dungeon exploration, combat and magic
An Open Source DOS emulator to run old DOS games
Android, UIQ 3.0, Series 60 Edition 5 open-source software
3D Engine c++
GemRB is a portable open-source implementation of the Infinity Engine
Chess Database and PGN viewer
RTS game with the theme of Strategy by Design
... the open-source glide computer