Proto:Sonic the Hedgehog 2 (Genesis)/Simon Wai Prototype/Green Hill Zone - The Cutting Room Floor

Sonic the Hedgehog 2 (Simon Wai prototype), Sonic Wiki Zone

Prototype Archives - Sonic Retro

Sonic the Hedgehog 2 (Nick Arcade prototype)

Sonic the Hedgehog 2, Sonic Wiki Zone

Sonic the Hedgehog 2, Sonic Wiki Zone

Prototype Archives - Sonic Retro

Dev Game Club

Sonic 2 Prototypes SCRAPPED ZONES & EARLY DESIGNS

Sonic the Hedgehog 2 (16-bit)/Hidden content - Sonic Retro

Dummied Out - All The Tropes

Proto:Sonic the Hedgehog 2 (Genesis)/Simon Wai Prototype - The

Proto:Sonic the Hedgehog 2 (Genesis)/Simon Wai Prototype/Green

Proto:Sonic the Hedgehog 2 (Genesis)/Simon Wai Prototype/Hill Top