E3 2016: Gwent: The Witcher Card Game Hands-On Preview, Gallery, Trailer Truly a massive update! 06.19.16 - 11:05 PM
As a part of The Witcher 3, the card game Gwent was an optional element that some gamers likely bypassed altogether, but it definitely captured the imaginations of others. In fact, some folks liked it so much that they built a mod for the main game that replaced combat with Gwent matches.
And perhaps it was that enthusiasm that helped prompt CD Projekt RED to spin off this piece of The Witcher 3 into its own independent release, unsurprisingly titled Gwent: The Witcher Card Game.