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When the city's under attack by an alien invasion, only the Nanobeast can defend the skies, the cities, and the people from the rampaging destructive alien forces! Blast the alien ships out of the sky, and upgrade the Nanobeast to ensure that the scientists can prepare a defense measure, and the military can carry out the orders.
W to throw a grenade. Use A to shoot left, D to shoot left, S to upgrade the Nanobeast. Use the Arrow Keys to move.