Alien Defence (S.A.A)

eliminate all aliens Parasites while improving your vehicle.
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The province of this exoplanet is invaded, the High Command entrusts you with the mission to clear 12 sectors. Beware the queen of parasites is hiding in one of the last sectors.
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Get death and life by eliminating aliens who leave you "bonuses" after death. Get credits after each area cleaned and used in the hangar to upgrade your armor (More ammo, more armor, faster turret).
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if you like S.A.A (Sky's army Armored) Upgrade to the "Gold" version (New missions, day-night cycle, new creatures and improvements)