It depends on if you're playing Sonic's, Shadow's or Silver's story.
it depends on
the second level
Sonic 06
sonic unleashed
FC Sonic Lehigh Valley was created in 2009.
Mephiles shoots sonic with a beam that kills him
Sonic Shadow Sliver ............that is if you mean sonic 06
Sonic Attack was created in 1981-06.
sometime after sonic 06 (sonic 06worst game eva)
Yes.
Twin Kingdom Valley was created in 1983.
Twin Kingdom Valley happened in 1983.