Full list of all 12 Sonic CD trophies - 7 bronze, 4 silver and 1 gold. It takes around 4-5 hours to unlock all of the trophies on PlayStation 3.
Complete the Time Attack mode in under 25 minutes
Destroy all the robot teleporters and Metal Sonic holograms in the past
Pass the upper Signpost in Collision Chaos Zone 2
Finish the game
Destroy Dr. Eggman's final machine
Defeat Metal Sonic without getting hurt
Find the angel statue in Wacky Workbench
Collect all the Time Stones
Complete a zone in the Good Future
Get a hug from Amy
Collect 200 Rings
Travel through time