Sonic Adventure 2 Cheats for PlayStation 3
When you complete the Hero Story, Dark Story and the Last Story this feature will appear as an option in the 1-Player menu. 'All Boss Attack' is a time attack mode where you face ALL the bosses from the Hero Story, then Dark Story then finally the Last Story in succession with no breaks.
This feature becomes available when you beat either Kart Race Action Stage (Route 101 or Route 280) and then beat the other.
When you beat Route 101 or Route 280 the 1-Player Kart Race will become available.
When you complete a level with every ring collected you will get a 'Perfect' stamp on the Ring Count and an 'A' rank.
When you complete the following tasks the corresponding playable character will become available in Versus mode.
Beat ALL of Tails' levels with an 'A' rank.
Beat ALL of Sonic's levels with an 'A' rank.
Get A ranks on ALL of Eggman's stage.
Beat ALL of Rouge's levels with an 'A' rank.
Beat ALL of Shadow's levels with an 'A' rank.
Beat ALL of Knuckles' levels with an 'A' rank