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
Sandbox video game with a powerful physics engine
A free & open-source 2D sprite editor, made with the Godot Engine
Diablo build for modern operating systems
Simple Beat Saber Mod Installer
Open source voxel game engine with support for survival and crafting
Magic Another Game Engine
fheroes2 is a recreation of Heroes of Might and Magic II game engine
Ct.js is a desktop game engine that makes learning programming fun
Multi Theft Auto is a game engine
An iOS & tvOS Frontend for Multiple Emulators
KorGE Game Engine. Multiplatform Kotlin Game Engine & Korlibs
Open game and rendering engine packed into a JavaScript framework
A complete 3-D game development suite written in Java
Open source clone of the Age of Empires II engine