So I jumped on the Steam bandwagon today, set up a user ID, and my wife bought me the Orange Box. So once everything is downloaded, the ID is registered, etc., I look forward to joining in on some GWJ mayhem.
However, I did notice that one game I have great love for couldn't be added to the Steam product line: Civilization IV. Apparently, the retail version has no Product Key. I was planning on buying the latest expansion pack (Beyond the Sword), but am a little concerned with whether or not there will be an issue between my retail core version and a Steam expansion pack. Last thing I want is to buy & download the expansion only to find out that it's incompatible with my full version of the game.
So has anyone given this a shot or are people just playing the Steam Version of the game out there?