There is an additional post-credits scene in the 2013 re-release that can be seen after collecting all of the emeralds that were missing in the original release. The scene shows the Death Egg crashing into Angel/Floating Island, and cuts to Robotnik angrily jumping on the "END" text, akin to Sonic the Hedgehog. Surrounding him are a number of bushes, through one of which Knuckles' eyes can be seen spying on Robotnik, as a foreshadowing towards Sonic the Hedgehog 3.