IS is dance dance revolution, parappa the rapper, guitar hero, rock band, Elite BEat Agents, audisurf? or the many others. My favourite is elite beat agents because it managed to create a incredibly unique music rythm game in a world where music rythm games have become like clone of each other. it was also very addictive and had co-op and stuff. it's my fav, but I also love guitar hero audisurf and ddr. What about you guys?