Originally Posted by apici
I'd like to know if during private matches with a friend, running fast against each other help to boost up this trophy....thanks in advance!
This will not work in versus. However, if you and your friend play each other in ranked matches over Live, it should work. An earlier poster set up 2 consoles in his house with 2 copies of the game, and then logged in with a family member's gamer tag. It worked.