Guitar Rock Tour for the Nintendo DS is a music rhythm game that allows players to simulate playing the guitar or drums to a variety of rock and pop hits. The game's mechanic involves hitting notes in time with music tracks, using the DS stylus or buttons to strum the guitar or strike the drums. Players can embark on a virtual tour, playing through different sets and unlocking new songs and venues. With a focus on rock-themed soundtracks, the game caters to fans of the genre, offering a portable rock star experience. It appeals to those who enjoy games like Guitar Hero or Rock Band.