Godot is a powerful cross-platform game engine
Fast and lightweight JavaScript game engine built on WebGL and glTF
Open source voxel game engine with support for survival and crafting
The game engine for everyone
New Godot bindings for Swift
Urho3D Game engine
Free, open source game engine online
A cross-platform, open-source, pure C game engine for mobile game
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
An easy to use 2D HTML5 game engine written in TypeScript
Solar2D Game Engine main repository (ex Corona SDK)
A fresh & lightweight javascript game engine
Engo is an open-source 2D game engine written in Go
GemRB is a portable open-source implementation of the Infinity Engine
Orx: Portable Game Engine
Cross-platform 2D game engine (+ full OpenGL, +full OpenGL ES )
Game engine supporting many 3D/2D formats and graphic effects
Game engine to build text adventures.
Open source reimplementation of GTA San Andreas game engine in Unity
2D Game Engine
A cross platform Lua based game engine
Cross-platform 2D and 3D game engine
Free and Open Game Programming Language for Windows and GNU/Linux
Real-time RPG for PC/tablet/phone; multiple quests and random dungeons