Angry Birds Car Keys

In ancient times, when the battlefield out two equal military forces, commanders, to save his people exposed one soldier from each side. Only the strongest will win, while the losing side leaves the battlefield in shame, but in one piece. Angry birds and pigs, too, want a way to solve the conflict, but they have chosen the way more difficult. You need to look for clues in the pictures with their favorite characters. If you find all the keys to all the pictures, the bird will win.