Sonic 1, 2, 3&K don't have ranks.
Sonic 1, 2, 3&K don't have unlockables besides Super and Hyper forms.
Nobody ever gets a game over in Generations because its easy.
You're gonna force me to play through 4 piece of crap games? (Sonic 06, Unleashed, Sonic Heroes, Adventure 1)
And this challenges rules make no sense.