UK retailer ShopTo.net believes Gran Turismo 5 will be the biggest selling PS3 game of the year.
The indie outfit said pre-order sales "went through the roof" after the game was finally given a solid November 24 launch date by Sony last week.
"We've never seen anything like this before," said ShopTo marketing manager Philip Driver. "As soon as the new release date was announced the sales just went through the roof.
"This is a game that most PS3 owners have been waiting a long time for," he added. "Luckily we have prepared well and will be able to get GT5 to everyone that orders for release day."
Kazunori Yamauchi, president of GT5 dev Polyphony Digital, said of the game last week: "Our objective with GT5 was to create another great revolution which would not only satisfy our own high expectations, but would meet or even exceed the anticipation of the fans."