The Game will go platinum. I don;t see how he can't. He's already Gold. If he sells 20,000-50,000 everyweek for awhile he'll make it. Look at guys like Ice Cube & E40. It took them a long ass time to get GOLD but they did make it. The Game will be the same for PLATINUM.
Also I know the reasons for Jay-Z CD sales falling the second week. 1)Word of mouth got out on how bad the CD sucked and people stopped buying it or 2)Jay-Z purchased 500,000 copies for himself just to boost sales the first week then he forgot to do it the second week.