Immediately after "2" disappears during the countdown (just as the third sound in the countdown is heard), hold A. If done correctly, you will get a turbo boost when the race begins.
Sonic And Sega All-Stars Racing
Immediately after "2" disappears during the countdown (just as the third sound in the countdown is heard), hold A. If done correctly, you will get a turbo boost when the race begins.
Assassin's Creed III Preview
Dragon's Dogma
Ghost Recon
Borderlands 2
Epic Mickey 2: The Power of Two
Lost Planet 3
Happy Birthday