To win the Chao Ball for the Dark Garden, come in first place in the second Dark Race. You will find a new, creepy looking Chao Ball in the Dark Garden.

In the Security Hall stage you play as Rouge The Bat and are given 5 minutes to complete it. This can be quite difficult. If you have enough lives you can do this trick. If you cannot seem to find the Emeralds, intentionally die. You will keep the existing Emeralds that you have collected. You will begin at the start of the level and the Emeralds will move to different places. This is the fastest method for completing the stage if you are having trouble.

Raise a Hero Chao with one of the three Hero characters. Continually feed and train the Hero Chao and it should evolve (creates a tear-shaped "cocoon"). Once it evolves, ascending stairs should appear at the main Chao lobby leading to the Hero Garden.

Beat all 3 levels of the 4 Beginner Races (Crab Pool, Stump Valley, Mushroom Forest, and Block Canyon) to open Jewel Race and Challenge Race.

In Rouge's Inside the Pyramid stage, one of the robots you blow up is E-102.

Successfully complete the Hero or Dark side story modes to unlock boss attack mode. You will be able to fight the bosses from the side of the story you completed.

Successfully complete Tails' driving quest in the Hero side story to unlock the kart racing mini-game in the Hero side story. Successfully complete Rouge's chase mission in the Dark side story to unlock the kart racing mini-game in the Dark side story.

In Knuckles' Pumpkin Hill level, go to the one of the train gates. You can see Big The Cat hiding behind the gate, waving to you. You can also see him in the battle against Sonic while playing as Shadow.

Successfully complete the "Last Stage?" in story mode to unlock Super Sonic and Hyper Shadow.

Successfully complete the Hero and Dark side story modes. Then, enter story mode and a "Last Stage?" selection will appear on the menu between the Hero and Dark selections.

Raise a Dark Chao with one of the three Dark characters. Continually feed and train the Dark Chao and it should evolve (creates a tear-shaped "cocoon"). Once it evolves, descending stairs should appear at the main Chao lobby leading to the Dark Garden.

Place the game disc in a PC compatible CD-ROM drive to find several rendered images from the game.

Pause the game and press Y + X.