It was always assumed that Gran Turismo 5 would be a popular game. Just how popular was revealed in December, when Sony announced that the racing game had shipped 5.5 million units worldwide.

　　Gran Turismo 5 is now in the sextuple-platinum club.

　　This week, the game's developer revealed the PlayStation 3 exclusive has passed another milestone. Polyphony Digital has released shipment figures for its entire Gran Turismo franchise, which showed that the most recent installment has now shipped 6.37 million units worldwide. That's more than the 5.20 million units that Gran Turismo 5 Prologue shipped and nearly triple the 2.32 million units of Gran Turismo PSP that have made their way onto the market.

　　Overall, the Gran Turismo series has shipped 63.15 million units as of December 31, 2010. Gran Turismo 4 sold 11.19 million units, less than the 14.89 million units Gran Turismo 3 A-spec sold. Gran Turismo 2 sold just 9.37 million units, while the first Gran Turismo--released in 1998 for the original PlayStation--has sold 10.8 million units.

　　GRAN TURISMO SERIES SALES (in millions)

　　Gran Turismo--10.80

　　Gran Turismo 2--9.37

　　Gran Turismo 3 A-spec--14.89

　　Gran Turismo Concept Series--1.56

　　Gran Turismo 4 Prologue--1.40

　　Gran Turismo 4--11.19

　　Gran Turismo 5 Prologue--5.20

　　Gran Turismo PSP--2.32

　　Gran Turismo 5--6.37

　　Total--63.15