 Some maps have buttons on them which can only be activated by tanks with sufficient combat experience, and it can take considerable foresight to ensure that a tank will be able to survive to that level and be able to reach the button.Dissassembling a tank will make it lose all experience.The game is very micromanagement heavy, requiring the player to spread attention thinly over maintaining the continually tiring sheep at the factory, tank battles, negotiation of terrain hazards such as quicksand, and tank construction.