Well lets start off by saying my biggest complaint about Descent was a lack of campaign. I hated that I would run through a dungeon and then be done, and the way to continue was not the most enjoyable.
Well my friends, this issue is solved in this. Welcome to Descent with a FULL ON CAMPAIGN!
The game plays well, however there are new rules that you must read before you get started on this game. The manual is literally a mini book, but that is also housing the quests that the adventurers go on.
This game is a great addition, but here it is listed at over 100 bucks! I called up all my comic book stars within a 2 hour drive of me, and was able to find one. They are not being printed anymore (at least until a new reprint happens) so I would advise you to find one and buy it now, or wait and hope for a reprint.
If you are unable to find one, the new Sea of Blood expansion has a campaign to it, however that is my least favorite campaign to run, just a personal opinion. This one seems to work a ton better.