Sonic 2 Reversed Frequencies is a ROM hack of Sonic the Hedgehog 2 for the Sega Genesis. Precise details on its developers are typically found within the hack's ROM file or shared among relevant online communities. 'Reversed Frequencies' likely indicates modifications to the game's sound design and music; possibly using reversed audio, remixes, or completely new tracks.  This alteration might affect the gameplay experience by changing the atmosphere and player's overall perception.  Distribution is usually through online forums and websites dedicated to Sega Genesis ROM hacks. The original Sonic 2 was created by Sonic Team at Sega, released in 1992.

Sonic 2 Reversed Frequencies

Sonic 2 Retro Remix