Another addictive game

This one won't have you up all night playing though, as it deliberately limits the amount of daily activity. It's called Cities and it's a good old fashioned MUD. The game has lots to explore and Quests upon which you can embark of increasing difficulty. Interaction with other players, a good (but possibly studenty) sense of humour and tantalisingly achievable tasks keep the interest levels up. LEEEROOOOOOYYY JEEEENNNNKIINNSS!! (?)