You are a commander of earth defense force who protects earth from the alien menace. after a sneak attack, earth has become vulnerable and you remain the only fighter to protect earth. gear up, choose your ship, purchase upgrades and prepare yourself to fight hordes of aliens through 15 levels and one endless stage. game features include *epic battles *space warfare in attractive zones *a wide depot of battleships to choose from *each battleship has different firepower to enhance your gameplay *exciting power-ups and upgrades *devious alien invaders which is sure to give you a challenging time *multilevel difficulty modes *hours of fun and excitement like us: www.facebook.com/boomboomspace
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