It is on the top of gaming market because of its features, graphics, concept this is the best game I love this game its features are awesome it has many types of guns and the concept of this game is awesome its graphics is also very good it uses very low amount of ram so it can be easily played in phones which have low amount of ram in evening I always played this game with my friends in multiplayer mode and it is played multiplayer in offline mode the best part of this game is that this game is available free in the google play market so this is the reason why I love this game a lot