DriveClub on Sony's PlayStation 4 sold over 2 Million copies according to a post by game director Paul Rustchynsky.
This figure is not shipped figure, it is sale figure.
Developer Evolution Studios congratulated Rustchynsky for his success.
According to Rustchynsky, Driveclub is popular still, although original release was in October 2014.
When asked how many concurrent players the game is seeing he didn't said exact figure he just said "It's more popular than ever right now."