Cybernations is a great, free online browser-oriented turn-based game. The player takes role as the leader of a nation, and manages it’s economy and military – however most of the game is concerned with politics and diplomacy, which occurs outside of the game mechanics, rather largely through forums and IRC. This revolves around alliances (of players) which are very thoroughly managed, and in general have a fully functioning government, constitution, treaties, ministries, forums, IRC channel and so forth.
It’s a very addictive game, and an excellent model for real life politics and diplomacy. You should try it. And if you do, be sure to join the best alliance – the Dark Fist.
You know you want to.