Xash3D FWGS engine
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Voxel game-creation platform with easy modding and game creation
The game engine for everyone
Cocos simplifies game creation and distribution with Cocos Creator
Multi-platform 2D and 3D game engine
Open source library for creative expression on the web, desktop, etc.
New Godot bindings for Swift
GemRB is a portable open-source implementation of the Infinity Engine
Orx: Portable Game Engine
Urho3D Game engine
Game engine to build text adventures.
2D Game Engine
Cross-platform 2D and 3D game engine
Real-time RPG for PC/tablet/phone; multiple quests and random dungeons
The Atomic Game Engine is a multi-platform 2D and 3D engine
Open-source, cross-platform, C++ game engine for creating 2D/3D games
Cross platform 2D/3D game engine written in C++11 & OpenGL ES 2/3
2D physics engine for games
cross-platform 2d game engine
Cross-platform 2D game engine