Activision Blizzard’s seems to be experts at (war)crafting huge gaming hits. The World of Warcraft free-to-play card game spinoff, Hearthstone: Heroes of Warcraft, has reached over 20 million active players. Releasing just in March of this year, Hearthstone‘s player base has nearly doubled in just 6 months. A championship tournament is being held at Blizzcon this November with a grand prize of $250,000!
Hearthstone: Heroes of Warcraft is currently available for free on PC, Mac, and iPad and is coming soon to iPhone and Android devices.