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The first cross-platform "Facebook-to-Mobile" social network game was developed in 2011 by a Finnish company Star Arcade.   Social network games are amongst the most popular games played in the world, with several products with tens of millions of players.  (
VK (short for its original name VKontakte; Russian: ВКонтакте, meaning InContact) is a Russian online social media and social networking service based in Saint Petersburg.