The fact that all free Angry Birds games on Windows Phone Store are considered a big "Black Friday" that Rovio is for those who are using Windows Phone.
As you can see in the picture above all Angry Birds games are free on the Windows Phone store, if you love Angry Birds games, download them quickly before the Games are charged again.
People can download this link Apps from Rovio Entertainment Ltd | Windows Phone Apps + Games Store (United States)
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