Sonic Adventure

Sonic Adventure is a game made in 1998 in Japan and 1999 in North America and was released for Dreamcast. The story is about Dr.Eggman working with a mutated creature called chaos zero and eggman plans to control the monster to rule the world. They also make the game's sequel sonic adventure dx: director's cut released in 2003, everytings the same, only that its for nintendo gamecube and PC and you can also unlock the early sonic games.
Playable Characters
*Sonic the Hedgehog
*Miles "Tails" Prower
*Knuckles the Echidna
*Amy Rose
*Big the Cat
*E-102 Gamma
Stages
*Emerald Coast
*Twinkle Park
*Speed Highway
*Casinopolis
*Windy Valley
*Icecap
*Red Mountain
*Lost World
*Sky Chase
*Skydeck
*Hot Shelter
sonic's bosses
chaos 0
egg hornet
knuckles
chaos 4
gamma
chaos 6
egg viper
tails' bosses
egg hornet
knuckles
chaos 4
gamma
chaos 6
egg walker
knuckles' bosses
chaos 2
sonic
chaos 4
chaos 6
amy's boss
zero
big's boss
chaos 6
gamma's bosses
beta
delta
epsilon
zeta
beta mark 2
last bosses
perfect chaos
perfect chaos (again)