Being introduced to this game last week by Pilot, I've found it very entertaining and time consuming.
"Evony (formerly known as Civony) is a browser-based multiplayer online game with graphic elements reminiscent of Civilization. The game is set in medieval times where a player is to establish a city, begin developing various technologies, and build supporting structures to generate armies and resources for the purpose of attacking other players and in-game opponents. Evony is also about making friends, and being part of a community, which in Evony is called an alliance."
Although the game is completely free, it will at many times try and ring you in to purchase things to get certain advantages.
I recently invited another friend to begin playing and I suggest you do to, we can all work together or some shit.
(http://img42.imageshack.us/img42/3904/evonyn.jpg)