Here is the full list of all 25 Grand Prix Rock 'N Racing achievements worth 1,000 gamerscore.
Champion in the Season 1!
China GP Time Trial completed in less than 03:26:00
Brasil GP Time Trial completed in less than 02:53:00
Spain GP Time Trial completed in less than 03:14:00
Japan GP Time Trial completed in less than 03:02:00
Germany GP Time Trial completed in less than 02:38:00
UK GP Time Trial completed in less than 02:48:00
France GP Time Trial completed in less than 02:09:00
Italy GP Time Trial completed in less than 02:14:00
Champion!
Japan GP 's Champion!
Canada GP Time Trial completed in less than 02:11:00
China GP 's Champion!
Spain GP 's Champion!
USA GP Time Trial completed in less than 01:22:00
Germany GP 's Champion!
UK GP 's Champion!
Set Box completed!
France GP 's Champion!
Italy GP 's Champion!
Canada GP 's Champion!
Reach more than 380 Km/h
USA GP 's Champion!
Brasil GP 's Champion!
You have played a race with four friends