I played this game called Dominion for the first time this weekend.  It's a strategy card game (all the cards come in the box, it's not a collectible game like Magic or Pokemon).  I can't believe how much fun I had with it.  It might seem incredibly nerdy, but the games are quick and it's so incredibly balanced that you really have to be on your toes to win.I found a free version for android in the market called "Androminion", which is almost as fun as the actual game.  I'd recommend it for anyone who doesn't need their free time anymore.