If there's one thing about Nintendo, it's that it has always focused on couch co-op and multiplayer. The Nintendo Switch OLED model has a built-in ethernet port in the console's dock, but regular Switch users will have to purchase a LAN adapter as a separate accessory. If this happens to you, check your internet connection to see if it's secure. Some users have experienced quite a bit of input lag when playing both single-player and multiplayer games. Enjoy these classic games! Things to look out for Now you can experience these Sega Genesis games with friends regardless of whether or not they're sitting right next to you. Nintendo Switch Online Expansion Pack Sega Genesis Mega Drive End Online Session (Image credit: iMore)