「テトリス 99」には、インターネットに接続できる環境とNintendo Switch Onlineへの加入（有料）が必要なモードや機能があります。
Tetris (R) & (C) 1985～2024 Tetris Holding.
Tetris logos, Tetris theme song and Tetriminos are trademarks of Tetris Holding.
The Tetris trade dress is owned by Tetris Holding.
Licensed to The Tetris Company.
Tetris Game Design by Alexey Pajitnov.
Tetris Logo Design by Roger Dean.
All Rights Reserved.
Sub-licensed to Nintendo.
Certain new content developed by Nintendo, and any characters, sounds
and video games originally owned by Nintendo: (C) 2024 Nintendo.
(C) Nintendo