Diszkográfia

Stúdióalbumok:

• When Dream and Day Unite (1989)
• Images and Words (1992)
• Awake (1994)
• Falling Into Infinity (1997)
• Scenes from a Memory (1999)
• Six Degrees of Inner Turbulance (2002)
• Train of Thought (2003)
• Octavarium (2005)
• Systematic Chaos (2007)
• Black Clouds & Silver Linings (2009)

Koncertalbumok:

• Once in a LIVEtime (1998)
• Live Scenes from New York (2001) 
• Live at Budokan (2004)
• Score (2006)

Válogatásalbumok:

• Greatest Hit (...and 21 Other Pretty Cool Songs) (2008)

Középlemezek:

• Live at the Marquee (1993)
• Change of Seasons (2005)

Kislemezek:

• Another Day (1992)
• Lie (1994)
• The Silent Man (1994)
• Through Her Eyes (1999)
• Constant Motion (2007)
• Forsaken (2007)
• Rite of Passage (2009)

Videók & DVD-k:

• Images and Words: Live in Tokyo (1993)
• 5 Years in a LIVEtime (1998)
• Metropolis 2000: Scenes from New York (2001)
• Images and Words: Live in Tokyo/5 Years in a LIVEtime (2004)
• Live at Budokan (2001)
• Score (2006)
• Chaos in Motion 2007-2008 (2008) 

Videóklipek:

• Pull Me Under (1992)
• Another Day (1992)
• Take the Time (1992)
• Lie (1994)
• The Silent Man (1994) 
• Hollow Years (1997)
• Constant Motion (2007)
• Forsaken (2008)
• Forsaken (Live) (2008)
• Rite of Passage (2009)