Solar2D Game Engine main repository (ex Corona SDK)
The flexible game engine
Open Source real-time strategy game engine for early Westwood games
Fast and lightweight JavaScript game engine built on WebGL and glTF
A development environment focused on modding
Godot is a powerful cross-platform game engine
Multi Theft Auto is a game engine
Injectable LUA scripting system, SDK generator, live property editor
Open source voxel game engine with support for survival and crafting
RetroArch is a frontend for emulators, game engines and media players.
fheroes2 is a recreation of Heroes of Might and Magic II game engine
Blockbench - A low poly 3D model editor
Java library that enables cross-platform access to popular native APIs
Real Time Strategy game engine supporting early Westwood classics
Java/JavaFX/Kotlin Game Library (Engine)
The game engine for everyone
Open game and rendering engine packed into a JavaScript framework
A retro game engine for Python
Powerful, mature open-source cross-platform game engine for Python
Cross-Platform C++ 2D/3D game engine
Free, open source game engine online
A Flutter based game engine
The open-asset-importer-library repository
Magic Another Game Engine
Open source clone of the Age of Empires II engine