What is with this game? Almost everything cost zp. And as far I know to get zp, You need to pay with real cash... Is there any other way to get it? And how change mech look? Armor doesn't change it ? Transformation too...
The thing with TQ's games, you can play for free, but you'll be dominated gear/item wise unless you pay real cash. Everyone of the people I used to play them with describe them with the motto. "Free to play, Pay to win."