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An MMORPG using the Multiverse Platform (www.multiverse.net). This project includes game logic code and art assets. Note that the Multiverse server libraries itself is NOT open source.
Jiso Game3 was a 2D isometric MMORPG project (client/server) written in Java with an Ancient Greece theme. The project is no longer active, but the sourcecode is being made available under a BSD license for anyone who might find it useful.
The Grid is a network console game where players take the role of an avatar exploring a virtual world of computer systems where agents roam. Avatars can be customised by shape, code (skills), upgrades (equipment) and neuromancy (spells).
PAiN Mud codebase is a new MUD codebase written in Java. It provides general purpose persistence engine (PAiN DB) and ability of dynamic code reloading.
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LPCBuilder - A code generator for the LP breed of muds. One of the prime objects of the project is to streamline the process of writing LPC code, enabling the builder to spend his/hers time on creating interesting objects instead of typing code.
Pangaea will be a robust and feature filled game engine built using Allegro (http://alleg.sourceforge.net) It will be similar to Final Fantasy 1-3, etc., complete with map editor/world builder.
A graphical isometric multiplayer virtual reality server in MUD-style. Rooms and server code can be changed online. At the moment, there is also an IRC link. Clients are available in Java and Python/C.
Muq is a network server that goes several design generations beyond MOO or Java in providing support for applications characterized by these five requirements: Multi-user, Persistent state, Complex data, Complex code, and Distributed networking.
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The next generation mud is an open-source extensible, programmable mud
The next generation MUD is an open-source, programmable, customizable MUD server written in java.
It features the ability to program almost everything in the mud and does not have any default interface.
The mud is programmed in javascript and features a standard library allowing manipulation of the game world.
It's other key feature is the possibility for it to contain multiple independent muds in one server instance.
Ziaks is an adventures multiplayer online game using Arianne. It is an implementation of Stendhal game focusing a simpler code base, an implementation of the new RP system and full integration with a LAMP server.