Sonic '06 Website : SEGA : Free Download, Borrow, and Streaming : Internet Archive

Sonic 1 IGTA Public Release 1 : Free Download, Borrow, and

Sonic PC Collection (2009) : SEGA : Free Download, Borrow, and

Sega Genesis Manual: Sonic the Hedgehog (1991)(Sega)(JP) : Free

Sonic Advance Official Perfect Guide Versus Books : Free Download

Sonic Rush Adventure Flash Game (has bugs) : SEGA : Free Download

Sonic the Hedgehog 3 (Genesis) : SEGA : Free Download, Borrow, and

More Than a Memory: A Perfect Existence : KojiChao : Free Download

Sonic The Hedgehog 2 ( Nick Arcade Prototype) : Sega : Free

Sonic Legacy 3 2 17 : Free Download, Borrow, and Streaming