Collect all 6 Chaos Emeralds in the Special Stages and then beat Dr.Robotnik in the Final Zone. After he runs off make sure you hit his Egg Mobile so he gets destroyed.
Finish Sky Canyon level as Sonic.
Depends how addicted you are because if you are very addicted like me u can finish sonic adventure and sonic adventure 2 in 1 day
Can not! Just the final boss!
Not in Sonic's Story, but if you finish all of the storys, you get a new story to finish called 'Supersonic Story" where you fight Perfect Chaos, the strongest form of the evil creature in Sonic Adventure DX called Chaos.
Finish the heroes story then finish the Babylon story.
Sonic's Story isn't ready yet. Apparently, the creater didn't finish the full version yet.
finish classic mode 10 time's
finish the game
thirst you finish all teams in story mode, then you get 7 caos emralds. when you have done that you go to story mode then you go past team chaotix and then press on the outline of metal sonic then finish him off with rose chaotix and dark then you will be super sonic
Electrasol
Finish both the hero story and Babylon story then you can finish the last one.
well no because it got cancelled