Sonic heros.
Sonic 3D Blast came before Sonic Adventure.
Shadow the Hedgehog
You can't. Metal Sonic first appeared on Sonic CD, which came out after Sonic the Hedgehog.If you are talking about the Sonic 06 game, you can't unlock him there, either. The only came he can be unlocked on is Sonic Adventure DX: Director's Cut.
it all ready came out for game cube in 2003
Sonic Heroes.
Sonic Adventure 2 By The SuperAmr!!!!!!!!!!!!!
Sonic Adventure
Sonic R. Made in 1997 for the Sega Saturn and PC. Also in Sonic Gems Collection for the GameCube and PlayStation2.
Sonic adventure battle 2
You can click download game trial after clicking sonic adventure at the game marketplace.
None released 10 years ago exactly, give or take a few years it was around the time where Sonic Adventure and Sonic Adventure 2 were released (Late 1998-2001)
Sonic adventure 1 and 2