The Chao Garden from Sonic Adventure 2 has returned fully, and is now given slight upgrades which include new minigames (like Chao Boxing, Chao Karaoke, Chao Bobsled, etc.), the ability to customize your own Chao, and the purchasing of free Chao Eggs.

Shadow the Hedgehog's amnesia was unexpectedly cleared up by Turbo, and now wants to embark on a quest alone to gain either the Demon Emerald or Master Emerald's power for himself, as explained in his story, anyway.

Robotnik and the newly-reprogrammed Metal Sonic, wanting to allow the Demon Emerald to absorb ultimate amounts of power from beyond the universe.

Turbo the Mole (or Nitro the Mogura in Japan) debuts for the first time as a playable character, in the role of an antagonist who joins forces with Dr.

E-102 Gamma returns as a playable character with his own story, but in order to unlock him, you must beat the mode on the Normal or Hard difficulty with any character.

While Sonic Adventure 3 comes right after the events of Sonic Adventure 2, it borrows fewer story elements from the likes of Sonic 3 & Knuckles.

The Story Selection mechanics from Sonic Adventure 2 have been replaced with the Sonic Adventure 1 formatting, with improved character selection, a boss rush mode after you complete the game with all characters, and a Multiplayer Story Mode feature.

1p play sonic heroes