The game Hearthstone: Heroes of Warcraft is developed and published by Blizzard Entertainment and was released first on March 11, 2014 for PC. At the end of March there were more than 10 million of gamers playing Hearthstone. The game has also been published for Ipad and Android tablet. The last release of Hearthstone was on April 14, 2015 for iPhone and Android smartphones. Today there are more than 30 million of real gamers in Hearthstone. These are players who play the game regularly and not just once. It is one of the most played games.