Myth2 is an implementation of a binary tree and used to run an 'interactive story'. The user traverses down the tree and at each node is given a bit of story and two options to choose which path to follow. If there is no story after the option, the user is given the chance to add to the story. It is written in PHP 4 and uses MySQL for the backend. Output is fully XHTML 1.0 Transitional compatible and fairly flexible.
Genecys is a massively multi-player online RPG. It is a completely dynamic environment. Each server is completely unique and follows its own progression of events. Maps will be generated randomly, at server startup, as will towns and NPCs. NPCs will be AI controlled, and have their own lives in the game, and exist to interact with the players, not just to be slaughtered by the players.