felixdan1 said:
i have posted this on the steam forums but i want a quick answer and knowing you awesome guys are generally helpful i wanna know whether u can get a game like call of duty 4 and link it to steam. not just add it as a steam game but make it as if u downloaded it onto steam(mstly so i can invite friends to join my games easily) if not tell me if so tell me how. thanks in advance
Well, that all depends on whether or not the game you want is on this list:
https://support.steampowered.com/kb_article.php?ref=7480-WUSF-3601
If so, you can enter the CD-key into Steam and it gets added to your library as though you purchased it via steam. Again, it's limited to only whats there (and there's a mention that COD4 won't work), but it is handy to know.
Hope that helps.