Unlock Microsoft Gamerscore points, by completing the following Achievements!

Achievement	How to unlock
Cha Ching! ( 25 points )	Earn 1.000 credits.
Spare Change ( 10 points )	Earn 5.000 credits.
Big Earner ( 10 points )	Earn 10.000 credits.
Show Me The Money ( 10 points )	Earn 25.000 credits.
Splish Splash ( 35 points )	Earn a Trophy.
Right On Time ( 35 points )	Complete a Time Attack race.
It's a Start ( 20 points )	Earn a Bronze trophy or better on all stages.
Tick Tick Tick ( 10 points )	Beat all par times in Time Attack.
Golden Delicious ( 10 points )	Earn a Gold trophy or better on all stages.
Taste My Wake ( 10 points )	Download and beat a ghost in Time Attack.
Turbo Starter ( 10 points )	Turbo Start in a race by tapping the screen in sync with the countdown.
Looong Waaay Down! ( 5 points )	Be Airborne over 13 seconds.
Reckless Yachting ( 5 points )	Destroyed all Gondols in Venice in a single race.
Overdrive ( 5 points )	Had Boost activated through-out a whole race.