A cell-based puzzle game featuring classic and completely new puzzles
Murder is a pixel art ECS game engine
The multiplayer game engine
Engo is an open-source 2D game engine written in Go
Vivid is a modern C++ 3D engine using OpenGL4+
Go 3D Game Engine
3D C++ Game Engine - yet another open source game engine
Amazon Lumberyard is a free AAA game engine
2D Game Engine
2D Game Engine with Lua Scripting made on top of SFML
A cross-platform 2D game engine
Web powered cross-platform 3D, WebXR game engine
Portable game engine with main focus on point-and-click adventures
OpenSAGE is a free, open source re-implementation of SAGE
A mobile game distributed server implemented using netty4.X
Multi-threaded game engine for Android
Modern AS3 Game Engine
An advanced flexible game engine for Java.
Mahasona engine is an open source game engine.
Java decentralized cross-platform network multiplayer game engine