Here’s a full playthrough of Sonic & Knuckles + Sonic 2 from the Sega Saturn compilation disc Sonic Jam. In this longplay we’re doing normal mode, but I’m not sure what has changed from the Original mode.
I try not to abuse Super Knuckles so we can all enjoy the great soundtrack. I can never choose which is my favorite, but maybe Sonic 2 has my favorite Sonic soundtrack.
At the end I look to see if they added any extra like other games on the compilation, but alas, they did not.