To improve the efficiency of your tower, you can improve them, up to three times!
Build, defend the base and win! Project Defense Steam CD Key Features 6 types of turrets; system of improving turrets up to 3 times; Several long, thoughtful and interesting levels; Several types of enemies, from small vehicles to hug..You have to repel the enemy's attacks on the main base, for this you will need a variety of turrets, from the machine gun to the lasers and missile salvos..