Use a screenshot of Angel Island Zone or the Data Select screen.
What made these ports revolutionary was the "Retro Engine." It did not emulate the original Genesis hardware. Instead, it reverse-engineered the game logic and assets, running them natively on modern devices. This allowed for: Sonic 3 Rsdk
Because the official RSDK version remained locked within the Sonic Origins Use a screenshot of Angel Island Zone or
RSDK is the — the proprietary game engine and toolchain created by Christian Whitehead (also known as “Taxman”). It was originally designed to faithfully recreate Sonic CD , Sonic 1 , and Sonic 2 on modern platforms. The engine runs on a custom renderer that mimics the Mega Drive/Genesis hardware’s tile-based scrolling, sprite limits, and palette rules, but with modern enhancements: This allowed for: Because the official RSDK version
or prototype music found in early builds of the game (like the Nov 3, 1993 prototype). Implementation : In projects like Sonic 3 '14