A completely free, open-source, 2D game engine
JavaScript-based game engine designed to empower developers
Fast and lightweight JavaScript game engine built on WebGL and glTF
Descent 3 by Outrage Entertainment
Open source library for creative expression on the web, desktop, etc.
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Go bindings for raylib, a simple and easy-to-use library
2D Game Engine with Lua Scripting made on top of SFML
Open-source, cross-platform, C++ game engine for creating 2D/3D games
A generic 2D engine for any kind of game
TurboSphere is an easy to learn and powerful JS based game engine.
Cross-platform 2D game engine
OSGET is the first open source mobile game engine template.