Rovio is to open a development studio in London, focusing on massively multiplayer online games (MMOs), with the aim of reducing the companys reliance on the Angry Birds franchise.

Over the next two years, Rovio London will be building a collaborative team of some 20 people.

The London studio joins Rovio’s four other in-house studios (three in Espoo, Finland, and one in Stockholm, Sweden) as well as the company’s global network of external partner developers.

“Our business is profitably growing and London is the most logical place for us to found a new studio that will complement our overall global mix of internal and external developers,” said Rovio SVP Studios, Antti Viitanen. “London is also a fantastically diverse talent magnet.”

Angry Birds is the top-grossing paid mobile app, but despite licensing deals – including a 2016 movie – Rovio has struggled in recent years, laying off more than 300 people in 2014 and 2015.