Cosrin is a text-based MUD, it's the younger sister of Terris and is almost exactly the same in terms of gameplay. Cosrin can be found at

The game is full to the brim with 12 year old kids and people with no social life and apparently little else to do.

It is run mostly by volunteers who live mindless automatonic lives of drudgery in the game. Funnily enough though the people most likely to complain about how hard the staff work are the players themselves.