I try to play on one of the servers and i get an error msg saying "Unable to launch requested game as it is not a known game."

This happens to me too. Left 4 Dead 2 runs fine from gametracker lite, but when clicking from the website it gives that error.

I've the same problem.. I tried to put Left for dead into the games list of gametracker but it can't find the file.. WTF!?

seems like there is no help about this problem

same keeps happening to me

yea where the hell are the moderators on this site? Its gotta be a simple fix, all you need to do is change the links on the website.

You may want to consider posting in the GT Lite forums if you would like a response from the GT Lite devs.

and how long will that take

i get the same message.....any word on whats going on?

:(i cant download anything on this webside

listen just do this
find the server you like
copy the ip 123.45.678.90 and port :27015
ok now start l4d2 normally then once in game enable your developer console in options
then press ` the key above TAB and to the left of 1 to open the console
now type
connect 123.45.678.90:27015
obviously using the correct ip and port for the server you require
hope this helps