After getting the Light Shoes (and Crystal Ring to speed up the process), go to the Casino area, and step on the button to make the rings appear. You can do this repeatedly for more starting rings. Note: The ring limit can exceed 999, but you cannot tell exactly how many you have. Listen for the extra life sound to keep track of them. When you getting as many as desired, go to Emerald Coast, and complete the level without getting hit to be awarded with however many rings you have collected. Go to Chao Garden, then the Black Market, and use the rings there.Metal Sonic ("DX" DLC)
Collect 130 Emblems to unlock Metal Sonic. Select Trial mode, then choose Action Stage, and he will be a playable character. Note: You must have the the "DX" bonus downloadable content.Avatar Awards
Successfully complete the indicated task to unlock the corresponding Avatar Award:
- Sonic's Hi-Speed Shoes: Accumulate ten hours of game play time.
- Vintage Sonic t-shirt: Accumulate five hours of game play time.
Accomplish the indicated achievement to get the corresponding number of Gamerscore points:
- Miles "Tails" Prower (10 points): Become friends with Tails.
- Knuckles the Echidna (10 points): Become friends with Knuckles.
- Amy Rose (10 points): Become friends with Amy.
- E-102 "?" (10 points): Become friends with E-102.
- Big the Cat (10 points): Become friends with Big.
- Sonic the Hedgehog (10 points): Clear the Sonic story.
- Super Sonic (20 points): Clear all characters stories.
- The Fastest & Strongest (20 points): Get Level A on all the Action Stages.
- Sub Game Master (20 points): Get all Emblems of the Sub Games.
- Chao's Best Friend (20 points): Get all Emblems of the Chao Race.
- The Adventurer (20 points): Get all Emblems in the Adventure Field.
- The Perfect Adventurer (40 points): Get all 130 Emblems.
- Metal Sonic (15 points): Get all 130 Emblems by playing Sonic Adventure DX.
- Metal Sonic Master (15 points): Get Level A on all the Action Stages by using Metal Sonic.
- Mission All Accomplished (20 points): Clear all 60 missions.