Rovio, the creator of the popular Angry Birds game, said it received a $42 million investment from three venture capital firms.

The funding round was co-led by Accel Partners and Atomico Ventures. Leading super angel fund Felicis Ventures also participated.

Accel has worked with companies such as Facebook, and London-based Atomico was founded by Niklas Zennström, who also founded Skype. Zennström will be joining the board of Rovio.

Rovio has said sales of Angry Birds plush toys passed 2 million units. The company also says demand for its other products is high, as 40% of new customers on the iOS platform purchase the Mighty Eagle downloadable content.

Rovio has 50 employees in Espoo, Finland. Currently, Rovio is expanding Angry Birds to even other gaming platforms and media. The company has announced plans to roll out an online version of Angry Birds towards the summer, as well as developing Angry Birds games for all major consoles later in the year.

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