This strategy, in which it is necessary to protect the city from the defensive towers. Starting the game, you have defined the bag, which can be spent on the turret. Each turret is unique, except for the cost of different turrets have different points of life, damage, range and rate of fire. You should use their resources efficiently and correctly choose the type of towers. The enemy is not defenseless, he can also shoot and destroy your turret. If any of the destroyed towers, it must be replaced by another, until the enemy broke.