This is a pretty good online game. Basically you have to build and manage a nation and compete with other countries. The one with the highest net value at the end of the round wins, and rounds last about a month. This means gaining land by any means possible, contructing different types of buildings, building an army to defend and attack, carrying out research and so on. The best feature of this game is definitely the ability to attack nations and smite the weak. There are even different attack strategies to choose from, and you are able to sieze land, destroy buildings, steal money, steal food and wipe out civilians. There is also the option of spying on any nation you wish. You are also able to strike up alliances and join something like the UN, but it's a waste of time to be honest.

Top game for megalomaniacs. TOTAL POWARRRRR!!!
Check it out here.