tutor installasi l4d2

kk,cara lngkap install l4d2 gmn sih.....?
kok waktu aq mau main tb2 error di loading screenx........


thanks for help:thx:

http://www.indogamers.com/f709/index...upport-256791/

coba baca index nya disana ada Client download L4D 2 dan ada tutor nya :)