Sonic 2 on the Genesis codes work on this version too. On the Sega Genesis there are codes that unlock a level select, debug mode, and one that gives you all 7 chaos emeralds from the start.
And there's also the Expansion Pack tier that features Nintendo 64, Sega Genesis / Mega Drive, and Game Boy Advance games, providing a more varied library of retro games — for a price ...
It's hard to believe it's been three years since Nintendo Switch Online + Expansion Pack launched, bringing Game Boy Advance, ...