Barbette  
Build Barbette to protect your resources and upgrade it to increase its firepower. You need to pay attention as it does not work while being upgraded

Defense strategy:

     ·They have a high speed of fire and a nice range

     ·They can attack only ground unit and are easily get damaged by air strike or a mass of ground units

Gunner Tower                                                                                                                                                                                              Gunner Tower offers an extended shooting range for your defence. Gunners can also enemies in the sky.

Defense strategy:

·Gunner Tower is a defense unit with high cost performance, which owns a long range of coverage and damage over the ground and sky against single target

·A mass of enemies make them suffer

Missile Silo 

Missile Silo fires rallying enemies with shells. Please do not let the enemies too close to it as the weapon can only hit the enemies afar.

Defense strategy:

    ··A nightmare of a mass of enemies, but do not let enemies come too close

    ··Disadvantage: Low speed

Rocket Launcher
Rocket is the perfect weapon to deal with all flying troops, but it cannot kill anyone on the ground. That is to say, position it strategically.

Defense strategy:

     ··Excellent control and guide technology, terminator of air units

    ··No ground attack, do not leave it on the periphery of defense

Missile Battery
Missile Battery consumes large resources, but is more powerful to defend against the enemy on the ground or in the sky. Trust me, it is really worth the cost!

Defense strategy:

    ··Great AOE firepower, hard core of defense

    ··Disadvantage: Smaller range of defense

Prism Tower
Prism Tower is our secret weapon. Prism refracts incoming light which produces a shield to hide it from view. The tower will fire upon enemies when they approach.

Defense strategy:

    ··Invisible powerful defense unit, show up after attack an unit

    ··Disadvantage: Smaller range of defense

Mega Laser
Mega gun, with terribly fast shooting speed and amazing attack power, shoots laser to inflict damage to enemies. This weapon is an enemy's worst nightmare.

Defense strategy:

   ··Ultimate defense unit, owns highest fire speed and great attack power

    ··Can change to against ground / sky stance

    ··Need to charge with energy 

Walls
Walls are the shield protecting your buildings and double as an obstacle to slow enemy movements. You still need to pay attention to the troops in the sky.

Defense strategy:

 ··Put them in a rational place to fit the defense units, which will elevate tremendously the defense ability of base