Angry Birds (video game) was being played, the staff liked the characters, and the team elected to design a game around them. In early 2009, physics games, such as "Crush the Castle", were popular flash-based web games, so the Rovio team was inspired by these games. During the development of "Angry Birds", the staff realized the birds needed an enemy. At the time, the "swine flu" epidemic was in the news, so the staff made the birds' enemies pigs. Angry Birds was the studio's 52nd produced game and on its initial release, the game did not sell many copies. After Angry Birds was a
Angry Birds Transformers that the game appeals to Transformers fans, while also providing more proof that the Angry Birds can fit neatly into new stories and game genres, while the downside there are timers of multiple hours to upgrade a character, however gems to upgrade instantly (slowly earned or purchased with real money) make the upgrade happen instantly. Angry Birds Transformers Angry Birds Transformers is a side-scrolling shoot 'em up video game. The tenth installment in the "Angry Birds" series, the game is a crossover between "Angry Birds" and "Transformers", featuring battles between the Autobirds and Deceptihogs, "Angry Birds" versions of the Autobots