A Minecraft Launcher which is multi-functional, cross-platform
A complete 3-D game development suite written in Java
Godot is a powerful cross-platform game engine
Cross-platform 2D and 3D game engine with modular architecture
Doom-based AI research platform for reinforcement learning
Mangos ZERO is a server for World of Warcraft
Xash3D FWGS engine
A cross-platform PSP emulator
Cross-Platform C++ 2D/3D game engine
Open source cross-platform multi-purpose game toolkit
An Open Source Minecraft Launcher with Modern UX
The main repository for the Linux and Mac OS Bedrock edition Minecraft
Voxel game-creation platform with easy modding and game creation
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Cross-platform rhythm game for the keyboard
Powerful, mature open-source cross-platform game engine for Python
Free and open source real-time strategy game
Open Source MMORPG Framework
Cocos simplifies game creation and distribution with Cocos Creator
A bridge/proxy allowing you to connect to Minecraft
Stride (formerly Xenko), a free and open-source cross-platform C# game
Games you can play in your terminal written in go
The HTML5 Creation Engine
Cross-platform 2D game engine focused on ultimate productivity
Free, cross-platform 2D game engine powered by Haxe and OpenFL