dracoboy2
Lord of Altera
This game is awesome, and the best part it that its completely free and browser based (uses silverlight). Think of Risk, but online and a lot more freedom of movement. It isn't quick, with a full world map game normally lasting 3-4 hours, but there are plenty of 30 min scenarios you can create. It has a ton of maps, including Westeros, which is my favourite. So check it out, play a couple games...
http://atwar-game.com/home/
http://atwar-game.com/home/