The primary draw of the Ultimate Collection is its sheer volume of content compared to the standard 2009 release.
It increased the car count from roughly 400 to over 500, including exclusive additions like the Lexus LFA , Koenigsegg CCX , and the Mercedes-Benz SLS AMG . Forza Motorsport 3 Ultimate Collection [Jtag/RGH]
On modified consoles, users typically convert the discs to "Games on Demand" (GoD) format or extract the files to run directly from the HDD. The primary draw of the Ultimate Collection is