Clash of clans a very very strategic game.it is released on 2012 for ios and 2013 for android by supercell.
What game actually is: -In this game you have a village and your are chief of it. You have to upgrade your village.unlock different troops and collect elexiers and gold by looting to another village.
Advantages: -This game allow to expand persons thinking and managing power as it need very much calculated risk. You have to make a army by yourself with limited elexier and limited space and attack in different villages with different layouts and defenses.
Disadvantages: -This game take very very much time. As you grow old in game the time consumption increses and number of things to upgrade also increases. For becoming professional it take more than 5 years.
Who can play: - I did not prefer this game for students because of its high time consumption.you have to be updated to the game continously. Thats why game should be played by free persons who are doing jobs or housewifes etc.