Open Source real-time strategy game engine for early Westwood games
Solar2D Game Engine main repository (ex Corona SDK)
The flexible game engine
Entitas is a super fast Entity Component System (ECS) Framework
Fast and lightweight JavaScript game engine built on WebGL and glTF
A development environment focused on modding
Injectable LUA scripting system, SDK generator, live property editor
Godot is a powerful cross-platform game engine
Cross-Platform C++ 2D/3D game engine
Flax Engine, multi-platform 3D game engine
Simple and light-weight 3D game engine
Unity / XNA game patcher and plugin framework
Diablo build for modern operating systems
A free & open-source 2D sprite editor, made with the Godot Engine
Sandbox video game with a powerful physics engine
Simple Beat Saber Mod Installer
One framework for creating powerful cross-platform games
A simple and easy-to-use library to enjoy videogames programming
Magic Another Game Engine
Open source voxel game engine with support for survival and crafting
Ct.js is a desktop game engine that makes learning programming fun
fheroes2 is a recreation of Heroes of Might and Magic II game engine
An iOS & tvOS Frontend for Multiple Emulators
Open game and rendering engine packed into a JavaScript framework
KorGE Game Engine. Multiplatform Kotlin Game Engine & Korlibs