Where this game is free?

[Rosencrantz]

It's a whopping download (over 10GB iirc)

10-12GB of bad data management that Valve is currently fixing; this is projected to drop down to 5-6GB in another week, when Valve converts TF2 from a .gcf format to a streamlined .vpk pipeline. They've already done this with the TF2 Beta, so now it's just a matter of shipping out to the real game.