Hearthstone: Heroes of Warcraft Hearthstone Android and iPhone Release Date 2014: New Expansion to Have About 100 New Cards in its Booster Packs. Hearthstone is currently available for PC, Mac, and the iPad. Hearthstone: Heroes of Warcraft is a free-to-play digital collectible card game (CCG) developed by Blizzard Entertainment. Announced at the Penny Arcade Expo in March 2013, the game entered open beta in January 2014, and was released in March 2014. Hearthstone is available on the Microsoft Windows and OS X operating systems and on iPad and Windows 8 Touch devices. iPhone and Android tablet platform releases are planned for the second half of 2014.