In battle zone, the main purpose of the game is to keep your base alive as long as you can by building mazes using defense units. There are 10 kinds of defense units. Choose where and which one to build to block both air and land enemies away from your base. Once the base health comes to zero, the battle is lost. Destroying your enemy gives the defense units EXP points; the more damage a unit will inflict, the higher its ranking will be. As its ranking and medal count increases,defense units gain more abilities such as stun, teleportation, money steal, life steal, heavy damage, fast speed, wide range, critical hit, additionally more medals will results in more exp points. Enemies come in waves from all directions. The combat duration on battle zone will solely depends on your wisdom!