Godot is a powerful cross-platform game engine
An open-source sandbox tower defense game
Desktop/Android/HTML5/iOS Java game development framework
Stream switch games to your PC via USB or network
A simple and easy-to-use library to enjoy videogames programming
Sandbox video game with a powerful physics engine
UCI chess engine
A cross-platform PSP emulator
Open source cross-platform multi-purpose game toolkit
One framework for creating powerful cross-platform games
RetroArch is a frontend for emulators, game engines and media players.
Open source HTML5 game framework that offers WebGL and Canvas
Open source voxel game engine with support for survival and crafting
Java/JavaFX/Kotlin Game Library (Engine)
Home theater software and entertainment hub for digital media
Solar2D Game Engine main repository (ex Corona SDK)
The source code to VVVVVV
The game engine for everyone
An open source reimplementation of the Among Us Server
A dead simple 2D game library for Go
Open-source engine for Heroes of Might and Magic III
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Netcode that provides networking capabilities to GameObject workflows
KorGE Game Engine. Multiplatform Kotlin Game Engine & Korlibs
Gideros Release version