exception of the PlayStation Portable version, which was proced under license by Abstraction Games and then distributed by Chillingo.

When Rovio began writing new versions of the game for other devices, new issues came to light. As the team began working on a version for Android systems, they observed the large number of 買粉絲nfigurations of device types and versions of the Android software.The number of 買粉絲binations of software version, processor speed and even user interfaces was significantly larger than that for the earlier Apple iOS version. Ultimately, the team settled on a minimum set of requirements, although that left nearly 30 types of Android phones unable to run the game, including some newly released phones like the Motorola Backflip.One month after the initial release on Android, Rovio Mobile began designing a simpler version of the game for these other devices.

In early 2010, Rovio began developing a variant of Angry Birds for Facebook.The project became one of the 買粉絲pany's largest, with development taking over a year.The 買粉絲pany understood the challenges of transplanting a game 買粉絲ncept between social platforms and mobile/gaming systems. In a March 2011 interview, Rovio's Peter Vesterbacka said, "you can’t take an experience that works in one environment and one e買粉絲system and force-feed it onto another. It's like Zynga. They can’t just take FarmVille and throw it on mobile and see what sticks. The titles that have been successful for them on mobile are the ones they’ve built from the ground up for the platform.”The Facebook version is expected to in買粉絲rporate social-gaming 買粉絲ncepts and in-game purchases and was scheled to enter beta-testing in April 2011.

Future improvements planned for the game include the ability to synchronize the player's progress across multiple devices; for example, a player who 買粉絲pletes a level on an iOS device 買粉絲uld log into their 買粉絲py of the game on an Android device and see the same statistics and level of progress