Anno Domini (USA)

Progressive Metal - USA

Annon Vin

Progressive Metal - Germany

Anomaly (NL-2)

Progressive Metal - Netherlands

Anomaly (USA-2)

Progressive Metal - USA

Anorexia (TUR)

Progressive Metal - Turkey

Another Age

Progressive Metal - France

Another Life

Progressive Metal - Sweden

Another Side

Progressive Metal - Hungary

Another World (CH)

Progressive Metal - Switzerland

Anova

Progressive Metal - Other

Ansata

Progressive Metal - Brazil

Antalgia

Progressive Metal - Spain

Antares (ITA)

Progressive Metal - Italy

Antares (NL)

Progressive Metal - Netherlands

Ante Meridiem

Progressive Metal - Brazil

Anthelion (ITA)

Progressive Metal - Italy

Anthon Norwell Experiment

Progressive Metal - France

Anthriel

Progressive Metal - Finland

Anti Science Contract

Progressive Metal - United-Kingdom

Anti-Depressive Delivery

Progressive Metal - Norway

Antibody

Progressive Metal - Sweden

Anticlockwise

Progressive Metal - Italy

Antifreeze

Progressive Metal - Germany

Antipope

Progressive Metal - Finland

Antiquus

Progressive Metal - Canada

Anubis Gate

Progressive Metal - Denmark

Anublar Cetro

Progressive Metal - Argentina

Anubyss

Progressive Metal - USA

Anup Sastry

Progressive Metal - USA

Anurak

Progressive Metal - Spain

Anuryzm

Progressive Metal - United-Arab-Emirates

Anvil Therapy

Progressive Metal - Italy

Anvision

Progressive Metal - Poland

Anxiety (BRA)

Progressive Metal - Brazil

Aokigahara (USA-1)

Progressive Metal - USA

Aone

Progressive Metal - France

Aoria

Progressive Metal - Sweden

Apeiron (BRA)

Progressive Metal - Brazil

Apeiron Bound

Progressive Metal - USA

Apeiron Restraint

Progressive Metal - Norway

Apes With Hobbies

Progressive Metal - United-Kingdom

Aphasia (USA-2)

Progressive Metal - USA

Aphelion (CAN-1)

Progressive Metal - Canada

Aphelion (CAN-2)

Progressive Metal - Canada

Aphelion (ITA)

Progressive Metal - Italy

Aphelion (SGP)

Progressive Metal - Singapore

Apoapsis

Progressive Metal - USA

Apoplexy (TUR)

Progressive Metal - Turkey

Aporia

Progressive Metal - Italy

Apotheus

Progressive Metal - Portugal

Apparitions Of Null

Progressive Metal - Australia

Appearance Of Nothing

Progressive Metal - Switzerland

Appomattox

Progressive Metal - Germany

Apsis (USA)

Progressive Metal - USA

Aquila (BRA)

Progressive Metal - Brazil

Aquiles Priester - Gustavo Carmo

Progressive Metal - Brazil

Arabesque

Progressive Metal - Netherlands

Aragon (AUS)

Progressive Metal - Australia

AraPacis

Progressive Metal - Canada

Arashk

Progressive Metal - Iran

Arborea

Progressive Metal - Spain

Arcadia (ITA-2)

Progressive Metal - Italy

Arcane (AUS)

Progressive Metal - Australia

Arcane Messiah

Progressive Metal - Ireland

Arcane Roots

Progressive Metal - United-Kingdom

Arcane Visions

Progressive Metal - Italy

Arcanum XII

Progressive Metal - Italy

Arcas (FRA)

Progressive Metal - France

Arch - Matheos

Progressive Metal - USA

Arch Echo

Progressive Metal - USA

Archaeologist

Progressive Metal - USA

Archaic Guilt

Progressive Metal - United-Arab-Emirates

Archangel (IND)

Progressive Metal - India

Archætype

Progressive Metal - France

Archetype (UK)

Progressive Metal - United-Kingdom

Archetype (USA)

Progressive Metal - USA

Archillusion

Progressive Metal - USA

Archipel

Progressive Metal - Switzerland

Areknames

Progressive Metal - Italy

Arena (UK)

Progressive Metal - United-Kingdom

Arge (MEX)

Progressive Metal - Mexico

Argon (FIN)

Progressive Metal - Finland

Argyle

Progressive Metal - United-Kingdom

Aria Inferno

Progressive Metal - Spain

Arise From Thorns

Progressive Metal - USA

Arity

Progressive Metal - USA

Ariya

Progressive Metal - United-Kingdom

Arjen Anthony Lucassen

Progressive Metal - Netherlands

Arjen Anthony Lucassen's Star One

Progressive Metal - Netherlands

Arjen Anthony Lucassen's Supersonic Revolution

Progressive Metal - Netherlands

Ark

Progressive Metal - Norway

Ark Ascent

Progressive Metal - United-Kingdom

Arkanika

Progressive Metal - France

Arkeronn

Progressive Metal - France

Arkhe (ITA)

Progressive Metal - Italy

Armageddon (SRB)

Progressive Metal - Serbia

Armcannon

Progressive Metal - USA

Arqum Iqbal

Progressive Metal - USA

Arret's Odyssey

Progressive Metal - Germany

Arritmia

Progressive Metal - Paraguay