User Summary: A conversion of the "Rock Band" franchise to the Sony PSP, "Rock Band Unplugged" merged the music, concept & settings of Harmonix' Rock Band to their gameplay mechanics of "Amplitude". Players have to hit controls in sequence to falling "notes", just like Rock Band/Guitar Hero et al, but at the same time, have to switch between different instruments as the song progresses, like Amplitude. Strictly single player, the game builds upon the "World Tour" mode from Rock Band 2 & provides an in-game DLC store for music downloads via PSN.