Why all games of Undead Patch doesn't work? I want HL2 Episode 2, but it just says that: "All Steam servers are too busy ATM, try again later", or something like that.
Yeah, I had this problem at first... you need to download the GCF's/NCF's (game files), put them in your steamapps folder, and then update the game in steam. Good luck!
I have the same problem. How I get L4D2 to work? I have the game files, but on Steam it just says download starting and it doesn't do anything else from there. I'm running the undead patch 6.66 as well. Halppppp.