Sonic 2 (16-bit) - Aquatic Ruin ~ Saving Tails from Drowning 

I actually did this challenge back in 2014. It was through a very hard ROM hack of this game. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-yUsj6zftI94.html (modified Special Stage 1 included) ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Ktdczs0VPHs.html (original Special Stage 2 included)

Good to see you back on RU-vid btw have there been times where you failed this challenge when trying to record this?