Sonic 3: D.A. Garden Edition is a hack based on Sonic 3 & Knuckles By D.A. Garden

The project that has been in development since July 2009.
the initial idea was to create a ROM hack of Sonic 3 & Knuckles that would provide the player with brand new level layouts from start to finish.
In total, 13 Zones of new layouts providing 23 unique acts of game play for 3 characters, and 14 new Special Stages for you to conquer.

Credits
MarkeyJester - S3K Layout Padder, SSRG Splash Screen, Invincibility Music Port and Bug Fixes
UtopiaUK - Testing and Bug Fixes
MainMemory - Testing and Bug Fixes
djohe - Testing and Bug Fixes
Flamewing - Bug Fixes
Varion Icaria - Bug Fixes