Clear a Zone as Knuckles the Echidna. (The Sandwich cheat must be off.)

Clear a Zone as Tikal. (The Sandwich cheat must be off.)

Find the Emeralds in Emerald Hill Zone (Normal or Hard).

Find the Emeralds in Chemical Plant Zone (Normal or Hard).

Find the Emeralds in Aquatic Ruin Zone (Normal or Hard).

Find the Emeralds in Casino Night Zone (Normal or Hard).

Find the Emeralds in Hill Top Zone (Normal or Hard).

Earn an A Rank in every single Zone of the game.

Find the Emeralds in Mystic Cave Zone (Normal or Hard).

Find the Emeralds in Oil Ocean Zone (Normal or Hard).

Find the Emeralds in Metropolis Zone (Normal or Hard).

Find the Emeralds in Wing Fortress Zone (Normal or Hard).

Find the Emeralds in Marble Zone (Normal or Hard).

Find the Emeralds in Spring Yard Zone (Normal or Hard).

Find the Emeralds in Labyrinth Zone (Normal or Hard).

Find the Emeralds in Hidden Palace Zone (Normal or Hard).

I'm feeling hungry...

Eat 3 Sandwiches in a single Zone (not Hidden Palace Zone).

Eat 5 Sandwiches in a single Zone.