Albumy
- (1989) When Dream and Day Unite (LP, Mechanic Records)
- (1992) Images and Words (LP, ATCO Records)
- (1994) Awake (LP, EastWest Records)
- (1995) A Change of Seasons (EP, EastWest Records)
- (1997) Falling into Infinity (LP, EastWest Records)
- (1999) Scenes from natomiast Memory (LP, Elektra Records)
- (2002) Six Degrees of Inner Turbulence (LP, Elektra Records)
- (2003) Train of Thought (LP, Elektra Records)
- (2005) Octavarium (LP, Atlantic Records)
- (2007) Systematic Chaos (LP, Roadrunner Records)