To date, Dream Theater has released fourteen studio albums. The band's highest-selling release is their second album Images and Words (1992), which reached No. 61 on the Billboard 200 chart. Both the albums Awake (1994) and Six Degrees of Inner Turbulence (2002) also entered the charts at No. 32 and No. 46, respectively, and received critical acclaim. Metropolis Pt. 2: Scenes from a Memory was ranked number 95 on the October 2006 issue of Guitar World magazine's list of The greatest 100 guitar albums of all time.[2] It is ranked as the 15th Greatest Concept Album as of March 2003 by Classic Rock Magazine. As of 2018, Dream Theater has sold over 12 million records worldwide and has received two Grammy Award nominations.