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ValveTime.co.uk | Valve News, Forums, Steam
K, I think I have a fix for the CD-key authentication problem. I haven't tested it yet though because I can't get onto steam atm. Well, here yah go anyway:
First off, if you're like me, your going to feel VERY stupid for about 30 seconds. It's ok, let it all out right now.
On your CD-key sticker there should be two lines of digits and letters. Something like this:
xxxxx-xxxxx-xxxxx-xxxxx-xxxxx
s7160880 Halflife 2
Alrighty, I'm not sure if that bottom line is the same for everyone, but the two CD-keys I've seen, that line was the same. Here's the solve: That bottom line that says "Halflife 2"? DON'T PUT IN ANY OF THE NUMBERS ON THAT LINE. It's not part of the CD-key! Only enter the top line of digits!
Hope this solves one of the many problems with this game for people.