Godot is a powerful cross-platform game engine
A cross-platform PSP emulator
Xash3D FWGS engine
Open source cross-platform multi-purpose game toolkit
Desktop/Android/HTML5/iOS Java game development framework
One framework for creating powerful cross-platform games
Stream switch games to your PC via USB or network
Voxel game-creation platform with easy modding and game creation
Free, cross-platform 2D game engine powered by Haxe and OpenFL
Open-source Android/Desktop remake of Civ V
Cocos simplifies game creation and distribution with Cocos Creator
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
RetroArch is a frontend for emulators, game engines and media players.
Open source library for creative expression on the web, desktop, etc.
Do virtual gear shifting (and more) in any rider app
Cross-platform game engine in Rust
The game engine for everyone
A habit tracker app which treats your goals like a Role Playing Game
A dead simple 2D game engine for Go
Action-adventure game originally released in 2013
3D Engine c++
Cross-platform 2D game engine (+ full OpenGL, +full OpenGL ES )
INSTEAD - Simple Text Adventure Interpreter.
3D modeler, 3D game maker, 3D demo maker
Space shooter style game arcade version - Games/Entertainment Software