what is the worst sonic game of all time?

SHADOW THE HEDGEHOG!!

also Sonic > Shadow
even this: Amy > Shadow (:O).
I can think of many more things that own Shadow like:
A Rock > Shadow

SA2B(it was too short)

my favorites: SADX
Sonic 2
Sonic 3
Sonic CD(Oh where, oh where is a rom for this wonderful game?)
SRB2(shot)

You can download Sonic CD all you want. But if you don't have a Windows 95, you can't play it. As for a rom...good luck with that.

Sonic CD as a rom is easy to obtain if you know where to look.