A fan-made game featuring Knuckles the Echidna in place of Sonic the Hedgehog.
Sega created a "Sonic and Knuckles" add-on that allowed players to play as Knuckles for Sonic the Hedgehog 2, but that add-on was NOT available for the original Sonic the Hedgehog 1.
This game replaces Sonic as a playable character is Sonic the Hedgehog 1.
Sega created a "Sonic and Knuckles" add-on that allowed players to play as Knuckles for Sonic the Hedgehog 2, but that add-on was NOT available for the original Sonic the Hedgehog 1.
This game replaces Sonic as a playable character is Sonic the Hedgehog 1.