10 Essential 1990s Progressive Rock Music Albums

10. Porcupine Tree - Signify

The Hertfordshire crew's fourth LP saw them go all in on psychedelia. The result was a colorful, fun effort that managed to serve both as a throwback to the '60s early days of prog and as an exciting new take on the long-running experimental genre.

Released in 1996, 'Signify' saw frontman Steve Wilson give the the rest of the band a more open-ended chance at creative contribution. The decision came following the general disappointment surrounding preceding album 'The Sky Moves Sideways', which had seen Wilson in total control and essentially functioning as a solo artist with a backing band.

Lead single 'Waiting' changed the game for the eclectic prog outfit, entering the UK Indie Charts and catching fire internationally, drawing the group far more interest than ever before both in the UK and across Europe. The two-part extravaganza is the most grand scale track on offer, but similarly lengthy songs like 'Dark Matter' and 'Intermediate Jesus' manage to give it a run for its money. Keeping the pace unpredictable, the group also dabble in faster-paced, more conservative-in-length songs that ensure the head-spinning 61-minute tour de force has plentiful peaks and troughs.

A hit with critics and listeners, 'Signify', well, signified the group's evolution as the '90s wore on.