Porcupine Tree are an English rock band formed by musician Steven Wilson in 1987. During an initial career spanning more than twenty years, they earned critical acclaim from critics and fellow musicians, developed a cult following, and became an influence for new artists. The group carved out a career at a certain distance away from mainstream music, being described by publications such as Classic Rock and PopMatters as "the most important band you'd never heard of".

The band began as a solo project for Wilson, who initially created all of the band's music himself. By late 1993, however, he wanted to work in a band environment, bringing on frequent collaborators Richard Barbieri as keyboardist, Colin Edwin as bassist, and Chris Maitland as drummer to form the first permanent lineup. With Wilson as lead vocalist and guitarist, this remained the lineup until February 2002, when Maitland left the band and Gavin Harrison was recruited to replace him. Porcupine Tree's early sound evoked various styles of psychedelic rock, space rock and experimental rock, later moving towards a more progressive/space rock direction comparable to that of Pink Floyd. Upon signing with Kscope record label in the late 1990s, the band began to approach a more mainstream alternative rock sound. By the early 2000s, the band had signed to a major record label and shifted their sound again, this time in a more progressive metal direction.

In 2010, after the tour in support of their 2009 studio album The Incident, the band became publicly inactive as Wilson committed himself to his solo work and other members began working on their own separate projects. However, Wilson, Barbieri and Harrison continued to intermittently work on material in secrecy over the course of the following decade, leading to the release of their album Closure/Continuation on 24 June 2022.

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1992On the Sunday of Life…Porcupine Tree2.8518
1993Up the DownstairPorcupine Tree4.1524
1994The Sky Moves SidewaysPorcupine Tree3.428
1996SignifyPorcupine Tree4.1524
1999Stupid DreamPorcupine Tree3.520
2000Lightbulb SunPorcupine Tree3.8516
2002In AbsentiaPorcupine Tree3.9520
2005DeadwingPorcupine Tree4.216
2007Fear of a Blank PlanetPorcupine Tree4.317
2009The IncidentPorcupine Tree3.8511
2022Closure / ContinuationPorcupine Tree4.58

Album + Compilation

1994Yellow Hedgerow DreamscapePorcupine Tree33
1998MetanoiaPorcupine Tree4.510
2000Voyage 34: The Complete TripPorcupine Tree3.510
2001RecordingsPorcupine Tree34
2002Stars Die: The Delerium Years ’91–97Porcupine Tree35
2008Porcupine Tree Sampler 2008Porcupine Tree21
2020The Delerium Years (1991–1997)Porcupine Tree1
2020The Sound of No One ListeningPorcupine Tree1

Album + Live

1993Spiral CircusPorcupine Tree2
1997Coma Divine: Recorded Live in RomePorcupine Tree417
2003XMPorcupine Tree3.53
2004WarszawaPorcupine Tree27
2005XMIIPorcupine Tree23
2006RockpalastPorcupine Tree1
2006Arriving Somewhere…Porcupine Tree55
2008We Lost the SkylinePorcupine Tree3.52
2009IlosaarirockPorcupine Tree2
2010AnesthetizePorcupine Tree56
2010AtlantaPorcupine Tree1
2012Octane TwistedPorcupine Tree35
2020First live performance 4th Dec 1993Porcupine Tree1
2020Köln 4th Dec 2007 (TV broadcast)Porcupine Tree1
2020Los Angeles 30th July 2003Porcupine Tree2
2020Coma:Coda (Rome 1997)Porcupine Tree1
2020Salford (1994)Porcupine Tree1
2020IndigO2 (2008)Porcupine Tree1
2022Athens (1995)Porcupine Tree1
2023Closure / Continuation.LivePorcupine Tree1

Album + Demo

1997InsignificancePorcupine Tree1


1996WaitingPorcupine Tree32
1999Piano LessonsPorcupine Tree3.52
1999Stranger by the MinutePorcupine Tree32
1999Pure NarcoticPorcupine Tree32
20004 Chords That Made a MillionPorcupine Tree23
2000ShesmovedonPorcupine Tree33
2004Men of WoodPorcupine Tree1
2005ShallowPorcupine Tree3
2005LazarusPorcupine Tree44
2009Time FliesPorcupine Tree2
2021HarridanPorcupine Tree1
2022Of the New DayPorcupine Tree2
2022Herd CullingPorcupine Tree1
2022Rats ReturnPorcupine Tree1

Single + Live

2023HarridanPorcupine Tree1


1992Voyage 34 (Phases I & II)Porcupine Tree2
1993Voyage 34 (Phases III & IV)Porcupine Tree1
1994Moonloop EPPorcupine Tree2
1994Staircase InfinitiesPorcupine Tree33
2001Transmission IVPorcupine Tree34
2003FutilePorcupine Tree2
2007Nil RecurringPorcupine Tree38
2020Pure Narcotic – Acoustic Session 2012Porcupine Tree2
2023IA / DW / XTPorcupine Tree1

EP + Live

20102010-01: Acoustic SessionPorcupine Tree1
2020Acoustic Radio Session 2009Porcupine Tree1
2020BBC Session 13th April 2007Porcupine Tree1


1989Tarquin’s Seaweed FarmPorcupine Tree24
1990Love, Death & Mussolini E.P.Porcupine Tree3
1991The Nostalgia FactoryPorcupine Tree2

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