

For more information, read more in the v2.2.0 release post. This level is unlocked by obtaining three stars on all levels up to and including Birdday Party. “Rovio has fended off all rivals so far,” said analyst Tero Kuittinen from Finnish mobile firm Alekstra.In the v2.2.0, a new "Golden Egg"-like level called the "King Pig Level" was released for iPad (other platforms in v2.3.0). Since then it has remained at top of the gaming charts with more than 800 million downloads and it had 200 million monthly users at the end of 2011, just short of U.S.-based Zynga’s 240 million. Rovio, originally founded in 2003, became a global phenomenon after it launched Angry Birds for Apple’s iPhone in late 2009.

Rovio said on Monday its finances were good enough for a listing after revealing a highly profitable 2011 in its first public disclosure of business results and forecast a bumper year ahead.

The Finnish startup making Angry Birds games - in which players use a slingshot to attack pigs who steal the birds’ eggs - has been valued by analysts at up to $9 billion, just short of that of struggling world No.2 phonemaker Nokia. Rovio Chief Executive Mikael Hed stands in front of an Angry Birds poster at his company's offices in Helsinki August 16, 2010.
