Godot is a powerful cross-platform game engine
Open source voxel game engine with support for survival and crafting
Xash3D FWGS engine
Voxel game-creation platform with easy modding and game creation
Multi-platform 2D and 3D game engine
The game engine for everyone
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
A dead simple 2D game engine for Go
Free, cross-platform 2D game engine powered by Haxe and OpenFL
Cocos simplifies game creation and distribution with Cocos Creator
Cross-platform game engine in Rust
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
New Godot bindings for Swift
Open source library for creative expression on the web, desktop, etc.
Orx: Portable Game Engine
GemRB is a portable open-source implementation of the Infinity Engine
A Complete WebGPU Game Engine for Browser & Desktop Arcade Oriented
Game engine to build text adventures.
Cross-platform 2D game engine (+ full OpenGL, +full OpenGL ES )
Urho3D Game engine
This project brings to Symbian hundreds of good old adventure games.
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