Save Earth from "fowl play" in the Christmas edition of Chicken Invaders 4: Ultimate Omelette! They came without warning, squawking menacingly, their ruffled feathers darkening the sun. Invading intergalactic chickens, out to punish humanity for our oppression of their earthly brethren. Now they're back, and they're having Earth for dinner! Journey to 12 star systems and fight through 120 waves of invading chickens. Collect weapons, bonuses, and secrets along the way in Chicken Invaders 4: Ultimate Omelette!