GTA: Age of War
You might notice that countries are always battling for territories and you might think that they are just a troublesome country. But, if you look at our history, you would notice that it is just common since the beginning of time. Man has been battling one group after another to claim something from the other side. In this game, you would experience the concept of war. You would start with the primitive age and evolve from one period at a time. The rule is to destroy the other base, but you can't do it in a single lifetime.