A longplay for Sonic 1 hack is Metal Sonic Hyperdrive, play as Metal Sonic include Extreme Mode.

Metal Sonic Hyperdrive is a heavy modification of Sonic the Hedgehog (1991) by Darkon360/LoneDevil for the Sega Genesis. with brand new Zones,
Sonic CD inspired Gameplay, Music, Playable Characters, and Game Modes. Starring Metal Sonic, taking Sonic's role as the main protagonist to stop Dr'Robotnik's greatest inventions yet. Also starring special guests such as Kirby, and the infamous Somari the Adventurer.