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

Press Pause Radio - Not Your Everyday Podcast - Late to the Party: Sonic Orgins

Sonic the Hedgehog CD (Jul 12, 1993 06:37 prototype) - Hidden Palace

Sonic Championship - The Cutting Room Floor

Sonic Mania - The Cutting Room Floor

Sonic the Hedgehog CD/Beta elements, Sonic Wiki Zone

Sonic the Hedgehog 4: Episode I - The Cutting Room Floor

Sonic Dash - The Cutting Room Floor

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

Sonic Mega Collection/Beta elements, Sonic Wiki Zone

Sonic Dash - The Cutting Room Floor

Sega MultiMedia Studio (demo)

Sonic the Hedgehog (1991) Cut Content and Version Differences

News/Sonic Month Part 1 - Sega No. 1 - Hidden Palace

Sonic the Hedgehog 2 Gets the Remastering Treatment, With the Long-Lost Hidden Palace Level Restored