Phaser is a free and fast 2D game framework for making HTML5 games
Classic 2D side-scrolling platformer game
Cross-Platform C++ 2D/3D game engine
Free, cross-platform 2D game engine powered by Haxe and OpenFL
Cross-platform 2D game engine focused on ultimate productivity
A web-based IDE for HTML5 game development. Powered by Phaser
Pymunk is a easy-to-use pythonic 2d physics library
Cross-platform 2D and 3D game engine with modular architecture
LayaAir is an open-source 2D/3D engine
A dead simple 2D game engine for Go
A game engine powered by python and panda3d
OpenSoldat is a unique 2D (side-view) multiplayer action game
Multi-platform 2D and 3D game engine
Cocos simplifies game creation and distribution with Cocos Creator
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
An easy to use 2D HTML5 game engine written in TypeScript
Easy to use Python library for creating 2D arcade games
Free game engine for development of desktop, mobile, and web games
A J2ME emulator for Android
Real Time Strategy game engine supporting early Westwood classics
2D JavaScript Physics Engine
A 2D rigid body physics engine for the web
A high-performance, industry-standard 2D physics engine built on Box2D
3D and 2D game engine written in Rust
LÖVE is an awesome 2D game framework for Lua