|  | Jethro Tull |  | 20 Years of Jethro Tull (1988) [Boxed set] |  |  | Progressive Rock, Folk Rock, Hard Rock | - | 0 | 
|  | Rick Wakeman |  | Time Machine (1988) |  |  | Art Pop, Progressive Rock, AOR | - | 0 | 
|  | Metallica |  | ...And Justice for All (1988) |  |  | Thrash Metal, Progressive Metal | 82.5 | 2 | 
|  | Vangelis |  | Direct (1988) |  |  | New Age, Progressive Electronic, Ambient, Progressive Rock | - | 0 | 
|  | Sieges Even |  | Life Cycle (1988) |  |  | Progressive Metal | - | 0 | 
|  | Supertramp |  | Live '88 (1988) [Live] |  |  | Progressive Pop, Adult Contemporary | - | 0 | 
|  | The KLF |  | What Time Is Love (1988) [Single] |  |  | Acid House, Hip House, Trance, Progressive House, New Beat | - | 0 | 
|  | Cardiacs |  | Cardiacs Live (1988) [Live] |  |  | Art Punk, Progressive Rock, Zolo | - | 0 | 
|  | Pink Floyd |  | Delicate Sound of Thunder (1988) [Live] |  |  | Progressive Rock, Art Rock | - | 0 | 
|  | Voivod |  | Nothingface Demos (1988) [Demo] |  |  | Progressive Thrash Metal | - | 0 | 
|  | Voivod |  | A Flawless Structure? (1988) [Single] |  |  | Progressive Thrash Metal | - | 0 | 
|  | Mekong Delta |  | The Principle of Doubt (1989) |  |  | Progressive Thrash Metal | - | 0 | 
|  | Triumph |  | Surveillance (1989) |  |  | Progressive Hard Rock | - | 0 | 
|  | Watchtower |  | Control And Resistance (1989) |  |  | Progressive Metal, Thrash Metal | 70 | 1 | 
|  | Yanni |  | Niki Nana (1989) |  |  | New Age, Progressive Electronic, Contemporary Instrumental | - | 0 | 
|  | Believer |  | Extraction from Mortality (1989) |  |  | Progressive Thrash Metal, Progressive Death Metal | - | 0 | 
|  | IQ |  | Are You Sitting Comfortably? (1989) |  |  | Neo-Prog, Progressive Rock | - | 0 | 
|  | Queensrÿche |  | Overseeing the Operation (1989) [EP] |  |  | Progressive Metal, Heavy Metal | - | 0 | 
|  | Queensrÿche |  | I Don't Believe in Love (1989) [Single] |  |  | Progressive Metal, Heavy Metal | - | 0 | 
|  | Queensrÿche |  | Video: Mindcrime (1989) [Video] |  |  | Progressive Metal, Heavy Metal | - | 0 | 
|  | World Trade |  | World Trade (1989) |  |  | Progressive Rock, AOR | - | 0 | 
|  | Mekong Delta |  | Toccata (1989) [Single] |  |  | Progressive Thrash Metal | - | 0 | 
|  | Ange |  | Vagabondages (1989) [Compilation] |  |  | Progressive Rock, Symphonic Prog | - | 0 | 
|  | Ange |  | Sève qui peut (1989) |  |  | Progressive Rock | - | 0 | 
|  | Banco del Mutuo Soccorso |  | Donna Plautilla (1989) |  |  | Progressive Rock | - | 0 | 
|  | Cardiacs |  | Archive Cardiacs (1989) [Compilation] |  |  | Progressive Rock, Art Punk, Post-Punk, Zolo | - | 0 | 
|  | Voivod |  | Astronomy Domine (1989) [Single] |  |  | Progressive Thrash Metal | - | 0 | 
|  | Voivod |  | From the Forthcoming Album Nothingface (1989) [Single] |  |  | Progressive Thrash Metal | - | 0 | 
|  | Voivod |  | Into My Hypercube (1989) [Single] |  |  | Progressive Thrash Metal | - | 0 | 
|  | Ozric Tentacles |  | The Bits Between the Bits (1989) |  |  | Space Rock, Psychedelic Rock, Jam Band, Progressive Rock, Psybient | - | 0 |