Nintendo has shared some more details about the Switch's online service, which is designed to be an "affordable, multi-featured paid service that lets users enjoy online play for compatible Nintendo Switch games, access classice NES games with added online functionality, back up save data for most games, and use additional features for the Nintendo Switch Online smartphone app."
The service will come with both individual memberships and family memberships, with the individual membership retailing at $3.99 USD for one month, $7.99 USD for three months, or $19.99 USD for a full year. The family membership will only be offered for a year-long subscription, and will retail for $34.99 USD. So if you have two Switches in the family, the family option is still worth it.
The NES offerings for the Switch Online service will start out with 20 games, though more will be added on a regular basis. The launch titles include Balloon Fight, Dr. Mario, Super Mario Bros. 3, Donkey Kong, Ice Climber, The Legend of Zelda, Mario Bros., Soccer, Super Mario Bros.,Tennis, and 10 still-to-be-announced games.
The service will also come with a cloud data storage option for game save data, which will be compatible for most Switch games. The cloud saves will be ideal for players who need to clear space on their Switch SD cards, port their saves to a new Switch console, or if they need to retrieve lost data.
As for multiplayer, well. A Nintendo Switch Online membership will be required to participate in co-op and competitive online features for many Nintendo Switch games like Splatoon 2, Mario Kart 8 Deluxe, ARMS, Mario Tennis Aces and Sushi Striker: The Way of Sushido.
Meanwhile the Online App will be a smartphone app designed to "enhance the online experience" for compatible games with voice chat and additional features, as the Switch does not have native VOIP support.
The Nintendo Switch Online service is set to launch in September of this year. You can find more information on the service here.