Sonic 3c Delta 11 !!link!! · Legit & Popular

If you own original hardware, look for Sonic 3 & Knuckles cartridges produced by Majesco in 1997 (usually identifiable by a slightly gray-er PCB and "Made in Mexico" on the label). Certain production runs of this cartridge contain the Delta 11 code path. Only about 5% of these carts contain the exact checksum matching Delta 11, making them highly valuable (auction prices range from $200 to $600).

(if you want to play or verify content): sonic 3c delta 11

: Unlike the original Sonic 3 standalone release, these Delta versions often include Sonic & Knuckles levels like Mushroom Hill (referred to as Mushroom Valley), Flying Battery, and Sky Sanctuary, fully integrated into the Sonic 3 engine. If you own original hardware, look for Sonic

SONIC 3C DELTA 11 — not a final game, not a beta, but something in between. A test build from late 1993, assembled in Sega's internal R&D lab on a Thursday afternoon, then locked away. (if you want to play or verify content):