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 POP! Angry Birds POP! Angry Birds POP! is a tile matching game co-developed by Rovio Entertainment and Outplay Entertainment that was soft launched for iOS in Canada in December 2014 and released worldwide for iOS and Android devices in March 2015. The game was originally the second game in the "Angry Birds Stella" series. It was originally released as "Angry Birds Stella POP!", and was given its current name, without Stella, with an update in July 2015 that added classic Angry Birds characters to the game. In October 2015, the game was released as a Facebook game that was discontinued on