Happy fourth Bird-day Angry Birds! Four years ago today, Angry Birds was born.
Following the release of the all-new Angry Birds Go!
kart-racing game Wednesday morning, Rovio also issued an update for its highly-popular Angry Birds game on the same day. The update brings Angry Birds up to version 4.0.0.
Rovio has added 15 all-new party-themed levels to the game for Angry