Dream Theater had Mike Portnoy in it.
Dream Theater is an American progressive metal band formed in 1985 under the name Majesty by John Petrucci , John Myung , and Mike Portnoy while they attended Berklee College of Music in Boston , Massachusetts . Mike Portnoy . From A Change of Seasons onwards , Portnoy had been writing a significant amount of Dream Theater 's lyrics . Besides his work with Dream Theater , Portnoy is known for his many side projects and tribute bands . He is a founding member of Liquid Tension Experiment , an instrumental progressive rock band featuring fellow Dream Theater members John Petrucci and Jordan Rudess along with bassist Tony Levin . In September 2010 , Portnoy announced his departure from Dream Theater after 25 years .