Sonic 3 and Sonic & Knuckles were first released on cartridges for the Sega Genesis/ Mega Drive. These cartridges can be physically joined to access the combined game, Sonic 3 & Knuckles. As such, most questions relating to sonic-3 & sonic-and-knuckles will also relate to the combined game.
I'm ok with the separate games existing as separate tags, however all the current questions under these tags (all 3 of them) also relate to the combined game sonic-3-and-knuckles.
Should we add sonic-3-and-knuckles to the questions in the other two tags, as they all relate to their single game and the combined game? If more questions are asked in future, we can then add this tag to those questions as the situation warrants.