Full list of all 12 Sonic CD achievements worth 200 gamerscore. It takes around 6-8 hours to unlock all of the achievements on Windows Phone.
Complete the Time Attack mode in under 25 minutes.
Finish the game.
Destroy Dr. Eggman's final machine.
Collect all the Time Stones.
Destroy all the robot transporters and Metal Sonic holograms in the past.
Defeat Metal Sonic without getting hurt.
Collect 200 Rings.
Find the angel statue in Wacky Workbench.
Pass the upper signpost in Collision Chaos Zone 2.
Complete a Zone in the Good Future.
Get a hug from Amy.
Travel through time.