The Daily Digit today is 3, as in 3-years-old.
In the game, players use a slingshot to attack pigs who steal the birds' eggs.
From the get go, Angry Birds has remained at the top of gaming charts, reaching 200 million monthly users by the end of 2011, racking up $100 million in sales.
Downloads hit a billion in 2012.
Rovio is producing and financing an Angry Birds movie.