Open source clone of the Age of Empires II engine
The Tiny JavaScript Game Engine That Can!
Full featured MUD server with all the trimmings.
The multiplayer game engine
Retro game engine for creating games like it's 1997
Open source reimplementation of GTA San Andreas game engine in Unity
Python ctypes module for the Irrlicht Engine SDK
DOOM / Heretic / Hexen source port with enhanced graphics and UI
3D playground built on three.js and cannon.js
A fast, scalable, distributed game server engine/framework for C++
Planimeter Game Engine 2D - LÖVE-based game engine for Lua
Multiplayer game server based on Node.JS
Game engine for playing tomb raider 1 - 5 levels.
A mobile game distributed server implemented using netty4.X
A 2d physics game engine for JavaFX
online 4X browser game engine
An online multiplayer turn based strategy game and board game engine.
Java decentralized cross-platform network multiplayer game engine
A 2D Adventure Game & Engine
TurboSphere is an easy to learn and powerful JS based game engine.
A multiplatform game engine for interactive fiction experiences
A retro style video game engine for RPGs and adventure games.
Java Client + JS/Canvas Server-Side System, with maintained Objects