Angry Birds: Knock On Wood Game. Build, launch and destroy with an exciting skill-and-action game based on the best-selling phone application. Game features three Angry Birds, green pigs, one slingshot-style launcher, structure pieces and mission cards. Players draw a card and build the structure shown before their opponents launch an Angry Bird in an attempt to knock it, and the pigs down to win points. For 2 or 4 players.