Being relatively new to the board gaming community, I have been dabbling here and there trying to find a good game that scales from solo play all the way up to multiple players.  Upon receiving my copy of Pathfinder ACG, I immediately dug into the first scenarios and found that this is a very clever card game that I have since developed a bit of an addiction to.  This game plays great solo!  Plays even better with 2 or more players!  The thing that I like best about the game is that there is player progression between multiple scenarios which comprise several adventures.  There is nothing like getting that new weapon in your hand that allows you to roll more just one more die to fight or acquire goodies.  I highly recommend this game and I think if you are on the fence, you should definitely give it a shot as it's well worth your time.