In Sonic 3 & Knuckles, Sonic and Tails continue to thwart the plans of Dr. Robotnik, this time on the Floating Island that is guarded by Knuckles the Echidna.
This is an over 6 minute improvement over the previous TAS that primarily makes use of a bug that "breaks the lock-on technology" of the Sonic 3 and Sonic & Knuckles combo, which tricks the game into loading Sonic & Knuckles and skip all the way to Mushroom Hill. We encourage viewers to read the authors' submission text for more details.
And also we have runs with Amy, Knuckles, Tails, Knuckles ring attack, Sonic 100%, Knuckles 100%, Competition mode and Sonic and Tails on NewGame+.
The downloadable encodes in the second set use a camhack, which attempts to always keep Sonic onscreen and puts HD sprites on top of the background to make the TAS look even better.