At No 10 position in the list of top 10 most popular online games is Hearthstone: Heroes of Warcraft. It is a digital collectable card game (CCG). The game is developed by Blizzard Entertainment and released in March 11, 2014. It is a free-to-play with unlimited paid content and limited free content game. The game is available on Microsoft Windows, OS X, iPad, Android tablet and Window 8 touchscreen devices. Hearthstone will be one of the most played online games in next few years. By January 2015, there were than 25 million registered Hearthstone accounts.
Hearthstone was first announced at Penny Arcade Expo in March 2013 for Windows, Mac, and iPad, with a release date of the same year. In August 2013, the game went into closed beta, to which over one million players had been invited as of November 8, 2013, with plans to enter open beta in December. Blizzard continued closed beta into mid-January 2014 despite their original estimation. Blizzard announced open beta for North America on January 21, 2014. Open beta was announced for Europe on January 22, 2014 and on January 23, 2014 open beta was made available in all regions.
