All Chaos Emeralds Found! Achievement
All Chaos Emeralds Found!30
Collect all seven Chaos Emeralds.
Collect all seven Chaos Emeralds for this achievement. To get to the Special Stage is the same as getting to them in Episode 1; get and hold on to 50 rings until the end of the level and jump through the giant ring after the goal post of an act. Meet the requirements of the Special Stage and the Chaos Emerald is yours.
Note: Any Chaos Emeralds you get in Co-Op are carried over to your Single Player game.
Here are some videos to help