|  | X Japan |  | I.V (2008) [Single] |  |  | Heavy Metal, Progressive Metal, Power Metal | - | 0 | 
|  | Ayreon |  | 01011001 (2008) |  |  | Progressive Metal, Progressive Rock | - | 0 | 
|  | The Mars Volta |  | The Bedlam in Goliath (2008) |  |  | Progressive Rock, Psychedelic Rock, Hard Rock | 85 | 1 | 
|  | Protest the Hero |  | Fortress (2008) |  |  | Progressive Metalcore | - | 0 | 
|  | The Cancer Conspiracy |  | Ω [a.k.a. Omega] (2008) |  |  | Math Rock, Progressive Rock, Post-Rock | - | 0 | 
|  | Amberian Dawn |  | River of Tuoni (2008) |  |  | Neoclassical Metal, Power Metal, Progressive Metal, Symphonic Metal | - | 0 | 
|  | Benea Reach |  | Alleviat (2008) |  |  | Christian Metalcore, Progressive Metalcore | - | 0 | 
|  | Biomechanical |  | Cannibalised (2008) |  |  | Progressive Metal | - | 0 | 
|  | Porcupine Tree |  | We Lost the Skyline (2008) [Live] |  |  | Acoustic Rock, Progressive Rock | - | 0 | 
|  | Magma |  | Mythes et légendes: Volume IV (2008) [Video] |  |  | Zeuhl, Jazz-Rock, Progressive Rock, Avant-Prog | - | 0 | 
|  | Angel Vivaldi |  | Revelations (2008) |  |  | Instrumental Progressive Metal | - | 0 | 
|  | Ihsahn |  | Scarab (2008) [Single] |  |  | Extreme Progressive Metal | - | 0 | 
|  | Royal Hunt |  | Paradox II: Collision Course (2008) |  |  | Progressive Metal | - | 0 | 
|  | Joe Satriani |  | Professor Satchafunkilus And The Musterion Of Rock (2008) |  |  | Hard Rock, Blues Rock, Progressive Rock | - | 0 | 
|  | Veil of Maya |  | The Common Man's Collapse (2008) |  |  | Progressive Metalcore, Deathcore | - | 0 | 
|  | Dream Theater |  | Greatest Hit (...And 21 Other Pretty Cool Songs) (2008) [Compilation] |  |  | Progressive Metal | - | 0 | 
|  | Rush |  | Snakes & Arrows Live (2008) [Live] |  |  | Hard Rock, Progressive Rock | - | 0 | 
|  | Destroy the Runner |  | I, Lucifer (2008) |  |  | Progressive Metal, Post-hardcore, Melodic Metalcore | - | 0 | 
|  | Circle II Circle |  | So Many Reasons (2008) [EP] |  |  | Progressive Metal, Power Metal | - | 0 | 
|  | Dark Empire |  | Humanity Dethroned (2008) |  |  | Progressive Metal, Power Metal, Thrash Metal | - | 0 | 
|  | Von Hertzen Brothers |  | Love Remains the Same (2008) |  |  | Progressive Rock, Hard Rock | - | 0 | 
|  | Nektar |  | Book of Days (2008) |  |  | Progressive Rock, Space Rock, Psychedelic Rock | - | 0 | 
|  | Beardfish |  | Sleeping in Traffic: Part Two (2008) |  |  | Progressive Rock | - | 0 | 
|  | The Pineapple Thief |  | Tightly Unwound (2008) |  |  | Progressive Rock, Alternative Rock, Art Rock | - | 0 | 
|  | Shai Hulud |  | Misanthropy Pure (2008) |  |  | Progressive Metalcore | - | 0 | 
|  | Ihsahn |  | angL (2008) |  |  | Extreme Progressive Metal | - | 0 | 
|  | Ozric Tentacles |  | Sunrise Festival (2008) [Live] |  |  | Space Rock, Progressive Rock, Psychedelic Rock | - | 0 | 
|  | Opeth |  | Watershed (2008) |  |  | Progressive Death Metal, Progressive Rock | 95 | 1 | 
|  | Tyr |  | Land (2008) |  |  | Progressive Folk Metal | - | 0 | 
|  | Communic |  | Payment of Existence (2008) |  |  | Progressive Metal, Heavy Metal, Power Metal | - | 0 |