Hearthstone has gone through a lot of changes in the past (nearly) four years it's been out. I'm not just talking about balance and card alterations, but multiple fundamental shakeups, including the introduction of the popular season collectible card game (CCG) format that occasionally relegates your old cards to the unofficial "wild" format.
While that mostly impacts the competitive side, Blizzard has also been steadily producing single-player content, which kicked off in earnest with the first adventure pack -- Curse of Naxxramas, released four months after the base game in 2014.
I sat down with lead missions designer Dave Kosak to get a sense of where Blizzard has been, and where they're going with adventures.
via destructoid https://www.destructoid.com/hearthstone-designer-and-destructoid-talk-adventures-how-they-ve-evolved-in-the-four-years-since-launch-484595.phtml