It's a new game engine, with a new set of 10 decks. Don't seem to have access to the decks from the old 2009 DotP game, although we can always play the old game separately I guess.
The new engine is prettier, faster, and more streamlined. So far, I like it better.
However, I'm worried that it's really damn hard. I started off on the highest difficulty, and lost 5 times in a row. Then bumped it down to Medium, and lost about 3 more. The two decks you start with are mono-white and mono-green. I'd been playing mono-green against the first campaign opponent (mono-red), and am getting my ass handed to me repeatedly. I checked out the WotC DotP forums though, and not really anyone else complaining about difficulty. I think green is simply weak vs red out of the gate. I'll try white tomorrow.
Some improvements / additions:
- You can subtract cards out of the base 60-card decks this time, and replace them with ones from their unlockable 16-card sideboard. (Last time you could only add more cards from the sideboard and were stuck using all the ones from the base deck.) It's not true deckbuilding from scratch, but you can tune and trim to your hearts content. Much better!
- The sideboard cards are also unlockable with purchased keys like before.
- These new decks contain cards from the new M:tG 2012 Core set.
- 2-headed giant is now playable online over XBL - woot!!!
- New Archenemy co-op mode where 3 players are pitted against an AI Archenemy deck like those ones Branden has!
- 15 new puzzle levels