Angry Birds Friends released for iOS, Android; original game free on Windows Phone till May 15

Rovio has released Angry Birds Friends, the latest iteration in everyone's favorite pig popping adventures. The game is now available as a free download for iOS and Android.

Angry Birds Friends puts a social twist to the game you are familiar with, letting you challenge your Facebook friends for the title of ultimate bird flinger. Players have the option to compete in weekly tournaments with friends and see if they can snag the gold, silver or bronze trophies. This is similar to how Rovio has been offering the game Angry Birds on Facebook.

Also included are daily rewards, the ability to send and receive gifts, and, of course, bragging about your accomplishments. If you're playing Angry Birds Friends on Facebook, your tournament progress will automatically be updated, so you can continue playing wherever you are.

The game also includes four classic power-ups, plus one exclusive to Angry Birds Friends on mobile.

Angry Birds Friends is now available as a free download for iOS and Android.

Rovia also announced a new version of the original Angry Birds game for Windows Phone, replacing the $2.99 version released earlier. The game has over 400 levels from the get-go, and is free to download for the first two weeks. The Windows Phone 8 version also features have Xbox Live integration with new achievements and leader boards.

Rovio didn't mention the exact reason for re-release, simply saying "it will be technically easier to support" the new version. The company recommends you download the new title even if you bought the earlier title, as the original game will no longer be updated.

Angry Birds for Windows Phone is free to download until May 15.