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 (video game) In January 2012, Angry Birds was released for devices using Bada OS. In February 2012, "Angry Birds" made its official debut on Facebook. It is known as "Angry Birds Friends" since May 23, 2012. The version launched with two chapters from the original game, along with then exclusive "Surf and Turf" chapter. The Facebook version adds a number of new power-up items, with a maximum of two in use per level. For example, the Super Seeds power-up will make the launched bird larger and thus more powerful, while the King Sling power-up makes the slingshot stronger and able to launch