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 Friends "Year In Space" to commemorate the return of the American astronaut Scott Kelly and two cosmonauts after spending one year on the International Space Station. The game has received mixed reviews with a Metacritic score of 65/100 based on 5 reviews. "Pocket Gamer" criticized the game for being "shallow and uninspiring" In April 2013, Rovio revealed that the Facebook game had been installed by over 60 million users, with 1.2 million daily active users and 10 million monthly active users. Angry Birds Friends Angry Birds Friends is a puzzle video game and the fourth game in the "Angry Birds" video