Godot is a powerful cross-platform game engine
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Multi-platform 2D and 3D game engine
Xash3D FWGS engine
Cocos simplifies game creation and distribution with Cocos Creator
Open source voxel game engine with support for survival and crafting
Voxel game-creation platform with easy modding and game creation
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
A dead simple 2D game engine for Go
New Godot bindings for Swift
The game engine for everyone
Free, cross-platform 2D game engine powered by Haxe and OpenFL
GemRB is a portable open-source implementation of the Infinity Engine
Cross-platform game engine in Rust
Motor de juegos de aventura programable
Orx: Data-Driven Game Engine
Play Fighting Fantasy fan stories on this simple engine
A Complete WebGPU Game Engine for Browser & Desktop Arcade Oriented
Cross-platform 2D game engine (+ full OpenGL, +full OpenGL ES )
Urho3D Game engine
Open source reimplementation of GTA San Andreas game engine in Unity
Cross-platform 2D and 3D game engine
Real-time RPG for PC/tablet/phone; multiple quests and random dungeons
Multi-threaded game engine for Android