Board Thread:Sonic News Channel/@comment-26567650-20141116054544/@comment-24816479-20141125012541

I think you should go by the timeline

Sonic the Hedgehog (1991) (Genesis)

Sonic the Hedgehog (1991) (GameGear)

Tails' Adventure (Gamegear)

Sonic CD (SEGA CD)

Sonic 2 (GameGear)

Sonic Chaos/Sonic and Tails (GameGear)

Sonic 2 (Genesis)

Sonic 3 and Knuckles (Genesis)

Sonic Triple Trouble (GameGear)

Sonic Blast (GameGear)

Sonic 4: Episode 1 (iOS, Android, Xbox 360, PS3, Wii)

Sonic 4: Episode Metal (with Episode 1 and 2: iOS, Android, Xbox 360, PS3)

Sonic 4: Episode 2 (iOS, Android, Xbox 360, PS3)

Sonic Adventure (Dreamcast)

Sonic Adventure 2 (Dreamcast, GameCube)

Sonic Advance (GBA)

Sonic Advance 2 (GBA)

Sonic Heroes (PS2, Xbox, Gamecube)

Shadow the Hedgehog (PS2, Xbox, Gamecube)

Sonic Battle (DS)

Sonic Advance 3 (GBA)

Sonic Rush (DS)

Sonic the Hedgehog (PS3, Xbox 360)

Sonic Rivals (PSP)

Sonic Rush Adventure (DS)

Sonic Rivals 2 (PSP)

Sonic and the Secret Rings (Wii)

Sonic and the Black Knight (Wii)

Sonic Chronicles: The Dark Brotherhood (DS)

Sonic Unleased/Sonic World Adventure (PS2, PS3, Xbox 360, Wii)

Sonic Colors/Sonic Colours (Wii, DS)

Sonic Generations (Xbox 360, PS3, 3DS, PC)

Sonic Lost World (Wii U)

In that order....