Magic: The Gathering
I downloaded the demo about a week ago and bought it the same day. It's exactly like the card game if you're a fan of it. The one downside to this game is the lack of real deck customization and sometimes idiotic AI.
Like they'll have 2 life left with a flying creature on their side and you'll have one 2/2 creature with 20 life. They'll attack you instead of saving it for defense of their lives. It seems like the main priority of the game's AI is to attack whenever they are certain they will go unblocked/killed.
Other than that the game is pretty much fun. Don't play with Jalek he cheats lol. Also there seems to be future decks to be released as DLC. There is nothing to do offline once you beat the single player campaign though outside of challenge mode where you have to win in one turn.
Other modes are co-op campaign home connection only. Mentor mode, where you can learn from someone online or teach someone. and online matches as well.