Angry Birds: LOST is a game where the real birds are lost and the new bird came to save them.
Red Bird, Yellow Bird and Black Bird came to their home with the other birds after defeating the pigs. Their eggs were saved. One Day a portal came. The Ice Bird visits the birds and tell them what is happening. The Pigs stole the eggs and the birds chased them into the portal. Meanwhile, one of the eggs hached and the new bird came, ready to defeat the pigs and save the birds. Soon,The Flock was saved and they discover the Pinwheel bird.