In 3-2-1, Rattle Battle!, players engage in a variety of mini-games that require them to shake the Wii Remote to "rattle" their way to victory. The intuitive controls allow players of all ages to participate, making it a great choice for gatherings.

The storyline of 3-2-1, Rattle Battle! is minimal, focusing instead on the competitive spirit of the mini-games where players aim to achieve high scores and challenge friends. The game encourages friendly competition and social interaction.

3-2-1, Rattle Battle! stands out with its diverse range of 12 mini-games, each designed to test different skills, from timing to concentration. The game also featured online leaderboards through Nintendo Wi-Fi Connection, allowing players to compare scores globally, although this feature was retired in 2014.