Master System - Sonic's Edusoft (Prototype) - Sonic - The Spriters

Master System - Sonic's Edusoft (Prototype) - Title Screen - The

Custom / Edited - Sonic the Hedgehog Customs - Metal Sonic (Master

Sonic the Hedgehog 3 - Master System style by PixelMarioXP on

Amy In Sonic 2 Sprite Sheet by E-122-Psi on DeviantArt

Master System - Sonic's Edusoft (Prototype) - The Spriters Resource

Sega Genesis / 32X - Sonic the Hedgehog (Prototype) - The Spriters

Custom / Edited - Sonic the Hedgehog Customs - Sonic (Master

Sonic the Hedgehog Game Reviews

Proto:Sonic the Hedgehog 3 - The Cutting Room Floor

Sonic the Hedgehog CD (Sega CD) - The Cutting Room Floor