The game engine for everyone
LayaAir is an open-source 2D/3D engine
Open source clone of the Age of Empires II engine
A retro game engine for Python
Free, open source game engine online
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Pycraft is an open-source, OpenGL based game made in Python
A cross-platform, open-source, pure C game engine for mobile game
2D Game Engine
Data-oriented and data-driven game engine written in Rust
Free and Open Game Programming Language for Windows and GNU/Linux
A game engine written in the D programming language
2D Game Engine for the Java Programming Language
Scripting language of the hawk game engine
Pig2D is a game engine for Java that uses a sprite-based interface.