Rovio Mobile has updated the insanely popular Angry Birds game to version 2.0, which includes 15 new birthday cake levels to celebrate the game’s second birthday. The popular bird-slinging game now has three hundred levels to unlock. Angry Birds debuted on iOS in December 2009 and has since expanded to multiple platforms including Android, PlayStation 3 and PSP, Symbian, Maemo, Microsoft Windows, and Mac OS X.
The game has experienced phenomenal success in its first two years, with downloads surpassing 350 million in September and then topping 500 million less than two months later. Spinoff versions of the game have also been equally as successful, including Angry Birds Rio and Angry Birds Seasons.
Version 2.0 of Angry Birds features spiffy new menus and graphics, a new expandable orange bird first seen in the Halloween edition of Angry Birds Seasons, and special birthday achievements to complete; furthermore, all in-game episodes have been unlocked to commemorate the birthday festivities. The update is free for all existing owners of Angry Birds on iOS, which costs $4.99 for iPad and $0.99 for iPhone or iPod touch.