Ruby-Newton is a Ruby wrapper for the NewtonGameDynamics physics engine ( http://newtondynamics.com/ ) It brings object-oriented real-time animated physics simulations to Ruby-enabled applications (e.g. 3D modeling tool with interactive scripting support
Pfff (Platforms' Fun Forever) is a platform game engine written in Ruby which intends to be very adaptive to different platform games. It means many features : graphically independent games, many player own powers, many weapons, many movements, etc.
Acid! is a full featured mud client written using ruby and the GTK windowing system. The goal is to create an easy to use interface to standard MUD requirements like triggers, aliases, variables, paths, mapping and much more.
Hollaka Hollala is a chatbot engine and IRC bot. The chatbot engine uses a knowledge base organized in an XML file and WordNet for dictionary lookup. The IRC Bot has some WordNet- and Web-based functionality and is hot-extensible through Ruby programs.
A Client/Server Implementation of Crystal Space providing a Ruby Scripting interface that allows completely flexibility to any RPG-Designers. A Single Player Game is also planned for the stable release of ORPG.
Doro is a text based roleplaying game engine, written in Ruby. It is designed to be modular and flexible replacement for traditional 'hardcoded' engines like Diku. Main website at http://www.foo.me.uk/doro/
Waterford procedurally simulates, and visualizes, demographic development.
Scripts for playing MUDs (Multi User Dungeons) using various clients.
Multi-platform, multi-system table-top role-playing game editor, manager, and tools for use in stand alone, networked, or mixed gaming sessions.
Best Seller - Ruby on Rails based online shopping application - sample/reference implementation from the Rails book ("depot" app), but with better interface and funny content - Best Seller: a shopping site that sells weird things ! :-)
PortaMon is a Role Playing Game (RPG)