Complete the following achievements to unlock Xbox Live Gamerscore points.

Achievement	How to unlock
Chaotic ( 10 points )	Collect a Chaos Emerald.
Complete the Game ( 25 points )	Finish the game.
Complete Chaos ( 25 points )	Collect all seven Chaos Emeralds.
Fast Freeze ( 25 points )	Complete the Icecap Zone.
Goodie Gumballs ( 10 points )	Get a blue gumball.
Halfway there... ( 10 points )	Collect 50 rings.
Marble Finishes ( 15 points )	Finish the Marble Garden Zone.
Points I ( 10 points )	Score 20,000 points.
Points II ( 15 points )	Score 40,000 points.
Points III ( 25 points )	Score 80,000 points.
Wet and Wild ( 15 points )	Finish the Hydrocity Zone.
Wet Feet ( 15 points )	Run across water.