queensrÿche has sold over 20 million albums worldwide, including over 6 million albums in the united states. the band received worldwide acclaim after the release of their 1988 album "", which is often considered one of the greatest heavy metal concept albums of all time. their follow-up release, "empire", released in 1990, was also very successful and included the hit single "silent lucidity". the band has received three grammy award nominations for songs from both albums. in 1998, drummer rockenfield received an individual grammy nomination.