You can make it - Open Source MMORPG Platform
PoC Minecraft client written in Javascript
TGMC: TerraGov Marine Corps, a SS13 mod
Contains the code for CM-SS13
Frankenstein lived
0 A.D. is a free, open-source, cross-platform real-time strategy game.
RTS game with the theme of Strategy by Design
LGSL (Live Game for PHP 5.4-8+: online status for various gameservers
NSV13, a Ship-to-ship Combat SS13 Server
An online multiplayer real time strategy game
A WebSocket library optimized for multiplayer JS games
X3D Prototypes for the SMUOS Component
A synchronisation component for p5.js
Multiplayer space station roleplaying game built on BYOND engine
PHP/MySQL/JS free multiplayer browser-based online game about tanks
Cosmos Tycoon is a open source transport simulation browser game.
Pixel War is a multiplayer fighting game made for computers.
Massively multiplayer online game server and client framework
Multiplayer online game using Phaser + WebSocket (Socket.IO)
JAVA websocket implementation for a bomberman-like game
An adaptive skirmish AI for Warzone 2100.
Free strategy browsergame engine.
Puzzle game demonstrating whats so hard about binary integer factoring