The concept of this game is really simple, you should have to build your own base and u should have to always improve it. The layout and design of this game is really nice where you can make a team(clan) of your friends. This game consists of many features and functions in which you can attack many players around the world. This game is really addicting and wastes a lot time. I will not say that this game is useful because it wastes so much time. But I prefer this game if you have a lot of time to play such a game.