Periodically, Tetris 99 hosts Special Events, often referred to as Grand Prix events. These are time-limited competitions that typically run for a weekend. During a Grand Prix, players compete to earn event points, usually by achieving high ranks in the main Tetris 99 mode. The primary reward for reaching a certain point threshold (e.g., 100 points) is an exclusive custom theme, often based on other Nintendo franchises like Splatoon, Animal Crossing, or Kirby. These themes change the background, Tetrimino designs, and sound effects of your game, offering a unique cosmetic flair. Participating in Grand Prix events is highly recommended, as these themes are usually only available during the event. Even if you don't win, simply playing and earning points contributes to unlocking the theme. Keep an eye on the in-game news or official Nintendo announcements for upcoming Grand Prix schedules. They provide a fun, competitive twist to the regular gameplay and a chance to earn rare cosmetic items.
