An interesting brower-game

[Mr Calavera]

I recently found this game, and have been absorbed by it ever since http://www.supremacy1914.com/

It is a map-based campaign game in the style of Diplomacy or Axis and Allies, with up to 30 players. Lots of fun back-stabbing and diplomatic subterfuge. It takes weeks to play a game, but you can play lots of games simultaneously. It works in real time, so you set your stuff building and your armies marching, and come back in a few hours to check up on it.