As of 2025, the S3C Customizer is considered "feature complete." However, the open-source nature of the project means that custom forks exist. Some developers have added "Randomizer" modes, "Sprite Swaps" (play as Amy or Ray), and "Level Shufflers" directly into the Customizer framework.
Choose whether levels like Ice Cap, Carnival Night, and Launch Base use the PC collection/prototype tracks or the official Sega Genesis release music.
Go through the tabs (Gameplay, Audio, Video, Text) and check the boxes for your preferred features. sonic 3 complete customizer
You will need to provide a legal, clean ROM copy of Sonic 3 & Knuckles or Sonic 3 to apply the patch.
: Navigate through the tabs (General, Graphics, Audio, etc.) and check the boxes for the features you want to include. Generate and Download As of 2025, the S3C Customizer is considered
The Sonic 3 Complete Customizer set a standard for fan projects. It proved that a "definitive edition" didn't have to mean a rigid set of changes. It respected that fans have different opinions on aspects like physics, music (especially the controversial MJ tracks), and difficulty.
Select all bug fixes, use Sonic 3 sprites, keep original music, and disable modern mechanics like the Drop Dash. Go through the tabs (Gameplay, Audio, Video, Text)
Tommy left with the cartridge in his pocket and the harmonica tune in his head. In the months that followed, he found messages tucked into forum posts and in comments of decade-old saves. New players found patched acts and whispered, as if discovering a secret garden: "I was here."
Purists and modern fans alike can tweak the game's art style:
You must upload a clean, legal ROM of Sonic 3 & Knuckles (or the separate Sonic 3 and Sonic & Knuckles ROMs) to act as the base.