niobe said:
just forget about the whole hl and move on to ut2k3/2k4 or something like that, steam just has to mutch problems to have fun with.
Dont post stuff like that if you cant stay on topic, help or dont post.
If you have a legal CD Key then you shouldnt have a problem. You need a HL or CS key to be valid, you have to enter the "-" where they are for it to work.
If it still does not work then you have a illegal copy and warez is not allowed here. But if you actully bought it call customer support, if you refuse to then you just show that its illegal.
Also WON was closed and only Steam is left, you can play LAN, only on Steam though from what I know.