Defend the planet from waves of invaders. Kill all your enemies, pick up bonuses, upgrade your tank, unlock new types of guns to deal with the 8 end-level bosses throughout the game.
You are a part of US Combat operation. Complete the operation by shooting targets down. You got limited time to complete the entire operation, otherwise you fail.
A new type of sci-fi themed tower defense in the near future with 12 laser turret units, a complete storyline campaign with huge map and over 20 waves of enemies.