What is your favorite Sonic the Hedgehog game? Mine is Sonic Adventure for the Sega Dreamcast. Sonic Adventure 2 was okay, but strayed way too far off of the original formula. Sonic the Hedgehog 2 would be my second favorite, followed by Sonic the Hedgehog 3, and then Sonic the Hedgehog. Anything after Sonic the Hedgehog 2 was just bad... Very bad...