Free DLC?

Does anyone know how to get the DLC for free, for the steam version? Or at the very least, the cheapest place to buy it? Zombie Chronicles is still around 50 bucks everywhere I've looked.

um i dont know how to get it for free but what are you talking about 50 bucks? on steam right now in north america it costs 30 bucks and also i dont know how to get it for free i had to spend like 60 bucks for all the dlc