Sonic Adventure

Play as Super Sonic: 
Beat the game with every character and the 7th character -"Super Sonic" - will be opened. 

Play as Tails: 
After he is obtained, use Controller 2 to play as Tails. 

Hidden artwork: 
Put the game disc in a PC CD-ROM drive to find additional art images from the game. 

New Twinkle Park Race view: 
Press Up on the Twinkle Park Race level to switch views. 

Full pause screen: 
Press Y + X at the pause screen.