Solar2D Game Engine main repository (ex Corona SDK)
Open source voxel game engine with support for survival and crafting
The source code to VVVVVV
Desktop/Android/HTML5/iOS Java game development framework
Godot is a powerful cross-platform game engine
Open source HTML5 game framework that offers WebGL and Canvas
One framework for creating powerful cross-platform games
A cross-platform PSP emulator
Action-adventure game originally released in 2013
New Godot bindings for Swift
The game engine for everyone
Voxel game-creation platform with easy modding and game creation
Cross-platform game engine in Rust
Free, cross-platform 2D game engine powered by Haxe and OpenFL
RetroArch is a frontend for emulators, game engines and media players.
Do virtual gear shifting (and more) in any rider app
Open-source Android/Desktop remake of Civ V
KorGE Game Engine. Multiplatform Kotlin Game Engine & Korlibs
Satisfying monster shooter
Open source cross-platform multi-purpose game toolkit
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Xash3D FWGS engine
Multi-platform 2D and 3D game engine
Java/JavaFX/Kotlin Game Library (Engine)
Sandbox video game with a powerful physics engine