Osu! Tatakae! Ouendan is a highly addictive music/rhythm game along the lines of Dance Dance Revolution. With this game, you use the stylus exclusively to follow numbered patterns that are synchronized to background music. The game itself consists of 15, full-length songs, each with 4 varying levels of difficulty.
The game takes place in a town where there are many people with varying degrees of distress. These people call on Ouendan, a squad of male cheerleaders, to help cheer them out of their problems. Using the stylus, and an incredibly addictive element of touch screen game play, you lead these cheerleaders to victory and (hopefully) help out these poor people too.
This game was adapted for an English release under the name "Elite Beat Agents" on November 6, 2006.
Note: All of the information contained within this article is derived from the Japanese version of Osu! Tatakae! Ouendan.