CD Projekt announced that within the package of
The Witcher 3: Wild Hunt will be including Gwent, card game inspired by Hearthstone. In practice we end up with a bunch of 150 cards invented and used by the dwarves, but which over time have been used by all the people who went in the taverns and that he wanted to spend some carefree time between mug and another beer. The deck of cards consists of 4 factions. In the Collector's Edition for Xbox One will find a map and fabric, not one, but two
real decks of cards to play to Gwent. The contents are intended solely for the Microsoft console.
MX Video - The Witcher 3: Wild Hunt