Open Source Game Servers

Arianne is a multiplayer online engine to develop turn based and real time games, providing a simple way of creating the game server rules and clients like our MORPG Stendhal. Our engine Marauroa uses Java and SQL for hosting hundreds of players on a solo host. Stendhal is a fun friendly and free multiplayer online adventure game with a huge and rich world. With hundreds of NPCs and different quests, features like the Travel log and achievement system keep track of progress. Thousands of creatures are ready to fight, above and below ground, and as players level up they can compare themselves on a detailed stats website. The engine Marauroa provides a simple way of creating games on a portable and robust server architecture. Marauroa manages the client server communication and provides an object orientated view of the world for game developers. It handles database access in a transparent way to store player accounts, character progress and the state of the world

Leaf, written in Go, is a open-source game server framework aiming to boost efficiency both in development and runtime. Simple APIs. Leaf tends to provide simple and plain interfaces which are always best for use. Self-healing. Leaf always tries to salvage the process from runtime errors instead of leaving it to crash. Multi-core support. Leaf utilize its modules and leaf/go to make use of CPU resouces at maximum while avoiding varieties of side effects may be caused. Each module runs inside a separate goroutine. Modules communicate with one another via a light weight RPC channel(leaf/chanrpc). Leaf suggests not to take in too many modules in your game server implementation. Gate module, for management of connection. Login module, for user authentication. Game module, for the main business.

Skynet is a lightweight online game framework which can be used in many other fields. Skynet is a lightweight framework designed for online game servers. Although from the feedback of the Community , it's not limited as a game server framework. On the Uses page, it shows a few projects that have used or currently using Skynet, but there are way more projects than listed. And welcome to be the next user. For Linux, install autoconf first for jemalloc. For FreeBSD , use gmake instead of make. Skynet now uses a modified version of lua 5.4.2 for multiple lua states. Official Lua versions can also be used as long as the Makefile is edited. With Socket API and SocketChannel , which makes it easier to implement socket pool and reconnect, you can use Skynet to call socket even asynchronously. Skynet doesn't force a specific protocol, you can come up with your own design.

GAMERBREED gives you the power to create your own original online real-time browser-based MMO on your website. It's fully customizable, giving you control over armies, worlds, cities, quests, resources and much, much more. Also, if you have knowledge of HTML you will be able to create themes for your own unique game! The project is still under development and it will be released under GPL licence in July this year. In the meanwhile keep up to date with the project progress in the forum or check the latest designs!

Moon is a lightweight game server framework based on the actor model. One worker thread can have one or more actors (services), which communicate with each other through message queues. There are many features for game server development.

TFOGS is a test framework for quick action game, it's anti-hack, and it provides a complete implementation to reduce lag.

WeeBot is a .NET framework for hosting bots and testing game modifications to the Weewar online TBS game (weewar.com). It provides APIs for bot development as well as a client and single game server for hosting and testing bots offline.

The Borg project is a framework for building MMORPG systems entirely written in c# . Borg provides the infrastructure and development framework with features like account authentication & management, message delivery, client and shared libraries... Update: this project is not active. You can still use it as a solid base for other projects or research.