|  | Strawbs |  | Classic Rock Legends (1998) [Video] |  |  | Progressive Rock, Folk Rock, Progressive Folk | - | 0 | 
|  | Digital Ruin |  | Demo Sampler '98 (1998) [Demo] |  |  | Progressive Metal | - | 0 | 
|  | Morte Macabre |  | Symphonic Holocaust (1998) |  |  | Progressive Rock, Symphonic Prog, Soundtracks | - | 0 | 
|  | Rick Wakeman |  | Master Series (1998) [Compilation] |  |  | Progressive Rock, Symphonic Prog | - | 0 | 
|  | Rick Wakeman |  | Themes (1998) |  |  | Progressive Rock | - | 0 | 
|  | Air |  | Moon Safari (1998) |  |  | Psychedelic Pop, Downtempo, Space Pop, Progressive Rock | - | 0 | 
|  | Anekdoten |  | Official Bootleg: Live in Japan (1998) [Live] |  |  | Progressive Rock, Symphonic Prog | - | 0 | 
|  | Devin Townsend |  | Ocean Machine - Biomech (1998) |  |  | Progressive Metal, Industrial Metal | - | 0 | 
|  | Renaissance |  | Innocence (1998) [Compilation] |  |  | Symphonic Prog, Progressive Folk, Progressive Rock | - | 0 | 
|  | Liquid Tension Experiment |  | Liquid Tension Experiment (1998) |  |  | Progressive Rock, Progressive Metal | 90 | 1 | 
|  | Symphony X |  | Twilight In Olympus (1998) |  |  | Progressive Metal | - | 0 | 
|  | X Japan |  | Art of Life Live (1998) [Live] |  |  | Heavy Metal, Progressive Metal, Power Metal | - | 0 | 
|  | Kansas |  | Always Never The Same (1998) |  |  | Progressive Hard Rock | - | 0 | 
|  | Premiata Forneria Marconi |  | A Celebration (1998) [Live] |  |  | Progressive Rock, Symphonic Prog | - | 0 | 
|  | Strawbs |  | Ringing Down the Years / Don't Say Goodbye (1998) [Compilation] |  |  | Progressive Rock, Folk Rock, Progressive Folk | - | 0 | 
|  | Frank Zappa |  | Cheap Thrills (1998) [Compilation] |  |  | Experimental Rock, Jazz-Rock, Progressive Rock | - | 0 | 
|  | Robert Fripp |  | The Gates of Paradise (1998) |  |  | Ambient, Soundscape, Progressive Rock | - | 0 | 
|  | Devin Townsend |  | Christeen + 4 Demos (1998) [EP] |  |  | Progressive Metal, Ambient | - | 0 | 
|  | Genesis |  | Genesis Archive 1967–75 (1998) [Live] |  |  | Progressive Rock | - | 0 | 
|  | Ruins |  | Symphonica (1998) |  |  | Zeuhl, Avant-Prog, Math Rock, Progressive Rock | - | 0 | 
|  | Athena |  | A New Religion? (1998) |  |  | Progressive Metal, Power Metal | 80 | 1 | 
|  | King Crimson |  | Absent Lovers: Live in Montreal (1998) [Live] |  |  | Progressive Rock | - | 0 | 
|  | Nektar |  | The Dream Nebula: the Best of 1971-1975 (1998) [Compilation] |  |  | Progressive Rock, Space Rock, Psychedelic Rock | - | 0 | 
|  | Savatage |  | The Wake of Magellan (1998) |  |  | Progressive Metal, Heavy Metal | - | 0 | 
|  | Pain Of Salvation |  | One Hour By The Concrete Lake (1998) |  |  | Progressive Metal | - | 0 | 
|  | Vitalij Kuprij |  | Extreme Measures (1998) |  |  | Progressive Metal, Neo-classical Metal | - | 0 | 
|  | Opeth |  | My Arms, Your Hearse (1998) |  |  | Progressive Death Metal | 90 | 1 | 
|  | Magnitude 9 |  | Chaos To Control (1998) |  |  | Progressive Metal | - | 0 | 
|  | Budgie |  | We Came, We Saw... (1998) [Live] |  |  | Progressive Hard Rock | - | 0 | 
|  | Budgie |  | Heavier Than Air (Rarest Eggs) (1998) [Live] |  |  | Progressive Hard Rock | - | 0 |