Oyvoyvoyv on 19 November 2008
Keep in mind that Pokemon Red or Blue alone sold over 15M each (which put them both above GT3), so if you count San Andreas, I guess you'll have to count them there.
http://www.vgchartz.com/games/userreviewdisp.php?id=261
That is VGChartz LONGEST review. And it's NOT Cute Kitten DS