With Dream Theater

Studio Albums :

• 1999 Metropolis pt 2: Scenes From A Memory (Elektra)
• 2002 Six Degrees Of Inner Turbulence (Elektra)

• 2003 Train Of Thought (Elektra/Asylum)
• 2005 Octavarium (Atlantic)

Lives

• 2001 Live Scenes From New York
• 2004 Live At Budokan
• 2006 Score
• 2006 Gigantour
• 2008  Chaos in Motion

Others

• 2000 Through Her Eyes (Single)
• 2003 The Making of Scenes form a Memory (Official Bootleg)
• 2005 When Dream and Day Reunite (Official Bootleg)
• 2005 Master of Puppets (Official Bootleg)
• 2005 The Number of the Beast (Official Bootleg)
• 2006 Dark Side of the Moon (Official Bootleg)
• 2007 Made in Japan (Official Bootleg)
• 2008 Dream Theater's Greatest Hit (& 21 other pretty cool songs)
• 2008 Forsaken (Digital EP)

Solo Albums

• 1988 Arrival
• 1993 Listen (Invincible Records)
• 1997 Secrets Of The Muse (KeyWiz Music)
• 1999 Resonance
• 2001 Feeding The Wheel (Magna Carta) 
• 2002 4NYC (Magna Carta Records)
• 2002 Christmas Sky
• 2004 Rhythm Of Time(Magna Carta)
• 2005 Bach to the Future (digital)
• 2006 Prime Cuts (Magna Carta)
• 2007 The Road Home (Magna Carta)
• 2007 Holiday Seasoning (digital)

Side projects

• 1997 Rudess/Morgenstein Rudess Morgenstein Project (Domo Records)
• 1998 Liquid Tension Experiment Liquid Tension Experiment(Magna Carta Records)
• 1999 Liquid Tension Experiment Liquid Tension Experiment 2 (Magna Carta)
• 2001 Rudess/Morgenstein Project The Official Bootleg
• 2007 Liquid Trio Experiment Somptaneous Combustion 
• 2008 Liquid Trio Experiment 2 When the Keyboard Breaks
• 2009 Liquid Tension Experiment Live 2008

Guest Appearances

• 1980 Speedway Blvd Speedway Boulevard (Epic records)
• 1988 Vinnie Moore Time Odyssey (Squawk / Polygram)
• 1989 Tom Coster Did Jah Miss Me? 
• 1994 Chorus Angelicus Voices of Light
• 1994 Annie Haslam Blessing In Disguise
• 1995 Various artists Romscape (Kurzweil Music)
• 1996 Various artists Steinway To Heaven (Magna Carta Records)
• 1996 Noirin Ni Riain Celtic Soul (Living Music)
• 1997 Kip Winger This Conversation Seems Like A Dream)
• 1998 Jupiter Project
• 1999 Renaissance Free as a Bird (Apollen International)
• 1999 Encores, Legends & Paradox A Tribute To ELP (Magna Carta)
• 1999 A Christmas Charol
• 2000 Paul Winter and The Earth Band Journey With The Sun
• 2001 Scott McGill Addition by Subtraction
• 2001 Prefab Sprout The Gunman And Other Stories
• 2002 David Bowie Heathen
• 2003 Jupiter Echo and Art
• 2004 John Petrucci and Jordan Rudess An Evening With John Petrucci and Jordan Rudess
• 2005 Daniel J Losing Time
• 2005 Neal Morse ?
• 2006 Neil Zaza When Gravity Fails
• 2007 Behold... the Arctopus Skullgrid
• 2007 K3 Under A Spell
• 2008 Ricky Garcia Let Sleeping Dogs Lie
• 2008 Steven Wilson Insurgentes