Following the format introduced in LEGO Rock Band for the system, Rock Band 3 on DS features music rhythm play without the need for any peripherals. Each musical part (bass, drums, vocals, and guitar or keyboard) appears in a separate lane, with players able to freely switch between lanes to complete strings of notes. To hit each color-coded note, simply press the corresponding button or direction on the Control Pad. In addition to the single-player game, which has you trying to master all 25 songs, you can work with up to three other friends in a cooperative mode or challenge a rival to a head-to-head match. In the cooperative mode, each musician plays a specific part for the remainder of the song. Head-to-head play offers simultaneous action within the same song, as each participant attempts to successfully hit more notes than the other. ~ Scott Alan Marriott, All Game Guide