Today you can hop online and download the first episode of Fable II.  Microsoft has split apart their 2008 Game of the Year RPG into several episodic pieces.  I'm not sure how much of the initial story is in the first episode.  It is also not clear how many of these episodes Microsoft will release and how much the future episodes will cost.  If you've never played Fable 2 you can look at this as a free demo of a great game.