The very mysterious Hidden Palace (omitted from Sonic 2) makes its appearance as an intersection. It is the secret underground sanctuary of the Chaos Emeralds and more importantly the home of the Master Emerald.

The final confrontation with Knuckles awaits as he must stop Sonic at any cost.

Hidden Palace Zone

Hidden Palace Zone

Hidden Palace Zone - Knuckles

Hidden Palace Zone - Robotnik

Knuckles and his abilities make for a tricky fight yet use of Sonic’s Intra-Shield should make for a quick fight when he's readying his fists, then assist Knuckles to defeat the real enemy, caught in the act executing his plan…

Sonic and Knuckles Main Page

Next Zone | Sky Sanctuary Zone