I just got a beta key for Blizzards new pay-to-play Magic: The Gathering clone. Hearthstone has the best looking and feeling interface of most virtual card games I've played, so it's a pleasant experience, if maybe a bit simplistic.
Completed all the tutorial battles without ever coming close to losing, including the battle against Illidan Stormrage, even though the game warned me that the battle was 'not fair' and I should 'blame the game designers'. I blame them for making games that are so well-balanced, that they never could be considered unfair.
Made a custom Murloc Swarm deck for my Paladin and beat Uther Lightbringer and thus unlocked him for playing myself.
Defeated Gul'dan the Warlock using a basic Paladin deck.
Hmm... You can't get more than 30 health for your hero.
Also, your Hero is a Character.
Beat Rexxar the Hunter.
Yay, I lost a game! To the Druid.
Got the Druid with my Hunter.
Defeated the Warrior with my Hunter.
My Warrior lost to the Shaman.
Damn, my MacBook Pro just had the craziest case of screen corruption. Random pixels everywhere, it's insane. Maybe I should try rebooting.
Accomplished Beat all Normal Practice opponents.
Yes, there are Expert level practice opponents as well!
Defeated Expert Mage with a basic Priest deck without taking damage. FLAWLESS VICTORY! This game is too easy.
Defeated Expert Hunter with a basic Paladin.
Defeated Expert Warrior with a basic Warlock.
Defeated Expert Shaman with a basic Warlock.
Defeated Expert Druid with a basic Warlock.
Defeated Expert Priest with a basic Warlock.
Defeated Expert Rogue with a basic Warlock.
Defeated Expert Paladin with a custom Warlock.
Accomplished Crushed Them All!.
- Defeated Expert Warlock with a custom Warlock.
completed the game (Single-player).
That seems to be all the single-player content in Hearthstone.
Blizzard released some new single-player content, so I am in. I've completed Curse of Naxramas: Arachnid Quarter (the only 'story' part that is unlocked yet), and the two Class Challenges, for Druid and Rogue. There is still 'Heroic' mode left...
Played a game against Anub'Rekhan on Heroic difficulty. I got it down to 2 health before I lost, so it definitely seems possible.