What different Sonic the Hedgehog games are available?

The Sonic the Hedgehog game franchise has these games: Sonic the Hedgehog, Sonic the Hedgehog 2, Sonic the Hedgehog Spinball, Sonic the Hedgehog 3, Sonic & Knuckles, Sonic Adventure, Sonic Adventure 2 Battle, Sonic Advance, Sonic Mega Collection, Sonic Heroes, Sonic Mega Collection Plus, Sonic Rush, Sonic and the Secret Rings, Sonic the Hedgehog (mobile), Sonic Unleashed, Sonic & Sega All-Stars Racing, Sonic Colors, and Sonic Generations.