nordlead on 18 November 2009
I would also like to point out that no games have reached 20m units on a console other than Nintendo games and most of those were heavily bundled. If GT5 even managed 15m units it would be phenomenal while breaking 10m would be amazing.
Did you know, that Nintendo has 25/35 games in the +10m sold category that VGChartz has tracked (probably missing some PC sales)
EDIT: and of course the +10m category is on a single console, so some multiplatform titles may actually reach that level.
