Angry Birds is a video game franchise created by Finnish computer game developer Rovio Entertainment. Inspired primarily by a sketch of stylized wingless birds, the first game was first released for Apple's iOS in December 2009. Over 12 million copies of the game have been purchased from Apple's App Store, which has prompted the company to design versions for other touchscreen-based smartphones, including the Android, Symbian and Windows Phone operating systems. It has since expanded to video game consoles, PCs and a full length feature film will release in 2016.
Angry Birds has been praised for its successful combination of addictive gameplay, comical style, and low price. Its popularity led to versions of Angry Birds being created for personal computers and gaming consoles, a market for merchandise featuring its characters and even long-term plans for a feature film or television series. With 2 billion downloads across all platforms and including both regular and special editions, the game has become the highest downloaded freemium game of all time. It has also been called "one of the most mainstream games out right now", "one of the great runaway hits of 2010", and "the largest mobile app success the world has seen so far".
Source: Wikipedia, "Angry Birds", available under the CC-BY-SA License.