Nightmare: The Acoustic MSG is an EP by the McAuley Schenker Group, released only in Japan, as a companion to the album M.S.G.. It contains acoustic versions of songs from M.S.G. and Save Yourself and follows the flow of unplugged recordings which were very trendy in those years. The recording of the unplugged version of these songs and their success in Germany and Japan inspired Schenker and McAuley to tour with only an acoustic set, which was later released in the live album "Unplugged" Live.