Introducing Birdquake power-up - Use the Birdquake to bring pigs' defenses crashing to the ground! Rattle the battle!
First look - Angry Birds Facebook Power-up bonus: King Sling video trailer - here
First look - Angry Birds Facebook Power-up bonus Super Seed video trailer - here
First look - Angry Birds Facebook Power-up bonus: Sling Scope video trailer - here
