need l4d2 the passing for pc?

I am a big fan of the video game. Left 4 Dead 2 is an cooperative first-person shooter video game. It is sequel of the Valve Corporation's award-winning Left 4 the Dead. The game launched on the November 17, 2009, for the Microsoft Windows and the Xbox 360 in the United States and November 20 in the Europe; in 2010. Left 4 Dead 2 was made available for Steam client on Mac OS X. It builds upon the cooperatively-focused on the game play of the original and uses Valve's proprietary Source engine, it is the same game engine used in the Left 4 Dead. The game made its world premiere at the E3 2009 with the trailer during the Microsoft press event. Now if you want to download this game than you can easily download its full version from any of the game downloading web sites in $19.99. You can also download its demo version for free from any of the game websites.