Nintendo [1] has finally revealed the details[2] of its paid online service after months of speculation by fans. The pricing is pretty much as expected ($20 per year), but the additions of online save game backups and NES games with added online multiplayer sweeten the deal.

We first heard the pricing last June, including the $3.99 monthly and $7.99 3-month options, but the announcement then left much to the imagination. This one makes things much clearer, but there are still a few mysteries it will perhaps clear up at E3 or closer to the September launch.

Save data being backed up online is perhaps the most asked-for feature on the Switch, [3] and one other platforms have provided for years. So its official announcement will surely be greeted with cries of joy. The exact details are coming soon.

But it’s the online play for NES games that really caught my eye. Officially called “NES – Nintendo Switch Online,” it will be a collection of 10 games to start and 10 more to come, all of which can be played in both single- and multi-player modes online. How that looks exactly isn’t quite clear; the Nintendo release says “Depending on the game, players can engage in online competitive or co-op multiplayer, or take turns controlling the action.”

Does that mean we’ll have leaderboards? Ghost runs in Super Mario Bros 3? Low-latency battles in Balloon Fight? No clue.

At least the first 10 games are confirmed: Balloon Fight, Dr. Mario and Super Mario Bros. 3, Donkey Kong, Ice Climber, The Legend of Zelda, Mario Bros., Soccer, Super...

Read more from our friends at TechCrunch