Sega Genesis / 32X - Sonic Classic Heroes (Hack) - HUD - The Spriters Resource

Sega Genesis / 32X - Sonic Classic Heroes (Hack) - HUD - The #1 source for video game sprites on the internet!

Proto:Sonic the Hedgehog (Genesis) - The Cutting Room Floor

Retro Gamer No. 146 (Digital)

Proto:Sonic the Hedgehog (Genesis) - The Cutting Room Floor

The Video Game Style Guide and Reference Manual

Games That Defined the Nintendo Gamecube - RetroGaming with Racketboy

Libretro – A crossplatform application API, powering the

32X, The Sonic Exe Wiki

All Trivia - VGFacts

The Video Games Textbook: History • Business • Technology [2 

Steam Műhely::sreckttttt

The Video Game Style Guide and Reference Manual