3-2-1, Rattle Battle! is a party game by Tecmo, officially released on August 31, 2009. The game was developed to leverage the unique motion controls of the Wii, aiming to create an engaging multiplayer experience filled with fun and accessible gameplay.

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.