GameMaster is essentially a game server. It is modular like After Dark (tm or something), in that games can be added and taken away at will. Each game is called a RuleBook. It is also capable of playing these rulebooks over a network. It can be run in the background and ignored, until someone connects to you over the network and asks you to play a game. One of its features is that if you do not have that rulebook, and you want it, GameMaster will automatically download it (or learn it), so you can then play it. It also handles upgrading in much the same way. If someone has a newer version of a rulebook that he wants to play with you, you can upgrade it.
