The game sistem is more than perfect...Co-op + pvp.But there is a BIG problem that KILLING this gold game.When you are lvl 70..you will see that you are still weak,and you will go to Gatcha draw...Then when you get some really good items..you will see that you are still weak.This is Soo,because...you must get minimum 6 perfect weapons of same kind to combine them,and ADD 20 + lvl to ur main weapon../70/90/110/130.This opeation will cost you minimum 50 $ real money OR 4-5 mounts gameplay. After you get bored from the game ,you will be very strong,,,.but you will prefer to change the game,cuz U will be Very bored allready.. shame realy..But i repeat that this is one of the best game sistems in aLL App store...respect to the Game-Team.Ones again..like allways..the hidden pay to win content ruinning the chance -this game- to be THE BEST.