I doubt that this is true, from what i know, steam will show all games, no matter what, with no cd key or a cd key, and consult Valve for help, there was a cdkey report there, but you require a code in the book (A Customer Support code i am guessing) or atleast, there is something. I still highly doubt that, and if i am wrong, don't you enter the cd-key for steam account, and also, if you already made an account but typed something wrong, that is why.