So I've been messing with this idea of an evolution based game for GURPS, loosely based on the game Spore. The game would be played over something like teamspeak using MapTools(if your unfamiliar, here ya go:
http://www.rptools.net/index.php?page=maptool). It wouldn't exactly be team based, each person would create and evolve their creature, starting at a very basic level and working their way up, you would only see what your creatures could see, maptools will help a lot here. I wanted player to be able to work their way up from basicly a single celled organism, to sapience, and eventually high TL's. Since it would be done over the internet, it would just be a game we would play every once and awhile, when people are available. Most of what I'm worried about is management of large amounts of creatures.