1. Hearthstone
Hearthstone isn't Blizzard's first foray into the world of trading cards, but it's certainly its most successful. Confined to computers (and soon to be seen on mobile devices), Hearthstone pits players against each other as the heroes of Warcraft, each with a unique deck of cards to their name. Heroes can fling spells at each other and summon all manner of beasts to take the field. Playing much like its physical counterpart, the Warcraft TCG, and Magic: The Gathering, Hearthstone has a really low entry barrier (it's free!) and an easy learning curve, making it the perfect game for both casuals and hardcore gamers alike.
