is believed to be pulled from a specific revision of the Sega Channel or a late-lifecycle cartridge reprint (possibly from the Majesco Sales era). Unlike the standard "Rev 01" or "Rev 02" ROMs, Delta 11 contains:
: 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. sonic 3c delta 11
: While often mistaken for a canceled "Limited Edition" compilation, research clarifies that "3C" was actually the internal development codename for the entire project before the split into Sonic 3 (3A) and Sonic & Knuckles (3B). is believed to be pulled from a specific
: Incorporating the move popularized by Sonic Mania into the classic Sonic 3 engine. : Incorporating the move popularized by Sonic Mania