For those of you who are unfamiliar with Konami's long-running rhythm series, Dance Dance Revolution is a game that is played with a flat dance mat that sits on your floor. It has four arrows on it. These arrows correspond to the onscreen action, which consists of arrows that rise to the top of the screen in time with the music. When the rising arrows hit a mark near the top of the screen, that's your cue to step on the proper arrow. It'll take a few hours for most people to really wrap their minds around the concept and to start reading the arrows with enough warning to really play properly. The game's training mode is helpful for those new players who can't seem to pick it up. The game can be played without a dance mat, but that really defeats the purpose.