The popular free-to-play Nintendo Switch game Tetris 99 is expanding. A new paid DLC, Big Block, is available today, and it adds multiple offline modes and more.

The $10 Big Block DLC adds the following modes:

CPU Battle -- Lets you play offline against 98 CPU opponents.

Marathon -- Clear as many lines as you can.

The #Tetris99 Big Block DLC is available on Nintendo eShop for $9.99 and adds offline modes! Battle 98 bots in CPU Battle, and survive in Marathon mode to clear the most lines possible! Stay tuned for more on additional upcoming game modes. https://t.co/t6cp0KnJLT pic.twitter.com/VKvai3xRCe — Nintendo of America (@NintendoAmerica) May 10, 2019

These modes are playable offline, and that's notable because the main Tetris 99 experience is an online-only game. It also means that you no longer need to have a Nintendo Switch Online membership to play Tetris 99 (if you buy the $10 DLC).

Nintendo also announced more details on the next Maximum Cup online event for Tetris 99. Maximus Cup 3 begins May 17, and just like the previous ones, you get points for the matches you play regardless of how you finish. Those who get 100 points or more will receive a new theme modeled after the original Game Boy. The event runs until May 19 at 11:59 PM PT.

Nintendo teased that it will announce even more new modes for Tetris 99 at a later date.

Tetris 99 has been very successful. Just this week, Nintendo president Shuntaro Furukawa talked about how the game has "helped maintain Nintendo Switch engagement" and also get more people to sign up for Nintendo Switch Online.