The first wave were just scouts. They were gathering intel on earths defense systems. Their planet was running low on natural resources and could no longer feed the flocks.
They needed new bird feed, and they found it in us...the people of earth.
As a member of EARTH GLOBAL DEFENSE, it is your job to protect this planet and eradicate these fowl invaders.
You, the player, are in charge of the Missile Defense System. Use it to the best of your ability to blow these beaked kamikaze invaders into chicken feed.
Show the world your high score on the Game Center leader boards.