- Alt'era (Thrash Heavy-Russia)
- Alt3r3d Stat3 (Dark Ambient-United-Kingdom)
- Alta Densidad (Power Metal-Chile)
- Alta Ray (Atmospheric Metal-France)
- Alta Reign (Progressive Metal-USA)
- Alta Rossa (Sludge Metal-France)
- Alta Tensão (Heavy Metal-Brazil)
- Altaar (Avantgardiste Black-Norway)
- Altair (ESP) (Heavy Metal-Spain)
- Altair (SWE) (Thrash Metal-Sweden)
- Altair (ITA) (Power Metal-Italy)
- Altair (VEN) (Power Metal-Venezuela)
- Altaïr (FRA) (Pagan Black-France)
- Altair (PL-1) (Thrash Heavy-Poland)
- Altair (PL-2) (Thrash Metal-Poland)
- Altamira (Gothic Doom-Hungary)
- Altamont (Stoner-USA)
- Altar (CR) (Progressive Heavy-Costa-Rica)
- Altar (FRA) (Thrash Speed-France)
- Altar (TUR) (Death Thrash-Turkey)
- Altar (ROU) (Thrash Metal-Romania)
- Altar (NL) (Death Metal-Netherlands)
- Altar Blood (Death Metal-USA)
- Altar Defecation (Black Metal-Australia)
- Altar In Darkness (Black Metal-Ukraine)
- Altar Of Ashes (Black Metal-Poland)
- Altar Of Betelgeuze (Death Doom-Finland)
- Altar Of Blood (Black Death-Mexico)
- Altar Of Dagon (Doom Metal-USA)
- Altar Of Flesh (Death Metal-USA)
- Altar Of Giallo (Death Metal-Spain)
- Altar Of Gore (Black Death-USA)
- Altar Of Moss (Dungeon Synth-United-Kingdom)
- Altar Of Oblivion (Doom Metal-Denmark)
- Altar Of Pain (Death Metal-Portugal)
- Altar Of Parasites (Death Metal-USA)
- Altar Of Perversion (Black Metal-Italy)
- Altar Of Plagues (Black Metal-Ireland) - Other name : AOP
- Altar Of Profanation (Black Metal-USA)
- Altar Of Rot (Black Metal-USA)
- Altar Of Sacrifice (Death Metal-Sweden)
- Altar Of Scion (Melodic Death-Australia)
- Altar Of Sin (ESP) (Thrash Metal-Spain)
- Altar Of Sin (UK) (Brutal Death-United-Kingdom)
- Altar Of Storms (Black Metal-Hungary)
- Altar Of The Apocalypse (Thrash Black-USA)
- Altar Of The King (Power Metal-USA)
- Altar Of Woe (Black Metal-Russia)
- Altoriu Seseliai (Ambiant Black-Lithuania) - Other name : Altar Shadows
- Altar (SWE-1) (Death Metal-Sweden)
- Altar (SWE-2) (Sludge Doom-Sweden)
- Altar The Sky (Black Metal-USA)
- Altar Whore (Technical Death-USA)
- Altarage (Black Death-Spain)
- Altared States (Speed Heavy-USA)
- Altareth (Stoner Doom-Sweden)
- Altari (Atmospheric Black-Iceland)
- Altaria (Melodic Power-Finland) - Other name : ex-Blindside
- Altarium (Dark Ambient-Australia)
- Altars (AUS) (Death Metal-Australia)
- Altars Ablaze (Death Black-Czechia)
- Altars Of Annihilation (Thrash Metal-Argentina) - Other name : AOA
- AOD (Thrash Metal-Finland) - Other name : Altars Of Destruction
- Altars Of Grief (Funeral Doom-Canada) - Other name : AOG
- Altars Of Madness (Progressive Heavy-Mexico)
- Altars Of Rebellion (Melodic Black-Colombia)
- Altars Of Sin (Thrash Black-Australia)
- Altars (USA-1) (Black Metal-USA)
- Altars (USA-2) (Hardcore-USA) - Other name : ex-Monuments
- Altayon (Progressive Metal-USA)
- Alte Eris (Gothic Metal-Ukraine)
- Altemis (Heavy Metal-Japan)
- Alter Bridge (Alternative Metal-USA)
- Alter Ego (USA) (Technical Thrash-USA)
- Alter Ego (ITA) (Heavy Metal-Italy)
- Dakon (Death Dark-Moldova) - Other name : ex-Alter Ego
- Alter (USA-1) (Technical Thrash-USA) - Other name : Alter Ego (USA)
- Alter Ego SF (Thrash Heavy-USA) - Other name : Psychomatic
- Alter Idem (Technical Death-Australia)
- Alter Kettenhund (Black Death-Germany)
- Alter Reign (Thrash Metal-USA)
- Alter Self (Thrash Death-Greece)
- Alter (USA-2) (Drone-USA)
- Altera (Metalcore-Chile)
- Altera Enigma (Progressive Metal-Australia)
- Alterbeast (Technical Death-USA)
- Alterblood (Indus Gothic-Finland) - Other name : AB
- Altercado (Hardcore-Chile)
- Altercate (Brutal Death-USA)
- Altercated (Death Metal-Poland)
- Altercation (Deathcore-USA)
- Alterdistrict (Metal-Hungary)
- Altereco (Heavy Metal-Italy)
- Altered State (CRO) (Heavy Metal-Croatia) - Other name : Altered
- Altered Aeon (Technical Thrash-Sweden)
- Altered Beast (FRA-1) (Heavy Metal-France)
- Altered Beast (FRA-2) (Groove Metal-France)
- Altered Dead (Death Metal-Canada)
- Altered Existence (Death Metal-USA)
- Altered Heresy (Black Metal-Belgium)
- Altered Moves Two (Technical Thrash-Netherlands)
- Altered Perceptions (Deathcore-USA) - Other name : AP, ex-Aphotic
- Altered Saints (Thrash Death-Venezuela)
- Altered Shade (Thrash Death-France)
- Altered State (USA) (Heavy Rock-USA)
- Altered States (NL) (Thrash Death-Netherlands) - Other name : ex-In Gods Hell
- Altered States (CHL) (Thrash Metal-Chile)
- Altered Symmetry (Progressive Metal-Colombia)
- Altered Throne (Melodic Death-Canada)
- Altered Vision (Progressive Metal-Italy)
- Altergeist (Melodic Power-Brazil)
- Alterhate (Crossover-Italy)
- Alterhyde (Alternative Metal-Chile)
- Alterity (Melodic Metal-Canada)
- Alterium (Melodic Power-Italy)
- Alterizer (Death Metal-Netherlands)
- Alternative 4 (Alternative Metal-United-Kingdom)
- Alternative Attack (Thrash Metal-United-Kingdom)
- AWS (Modern Metal-Hungary) - Other name : Alternative Wine Selection
- Alternative-ToD (Doom Black-Germany)
- Altertum (Black Metal-Norway)
- Altesia (Progressive Metal-France)
- Altess (Post Hardcore-France)
- Altharya (Symphonic Metal-Israel) - Other name : ex-Vipera
- Althea (Progressive Metal-Italy)
- Althema (Melodic Heavy-Japan) - Other name : ex-Second Hell
- Altherea (Gothic Metal-Italy)
- Altheria (Melodic Death-Estonia)
- Althotas (Death Black-Canada)
- Altiom (Symphonic Metal-USA)
- Altithronus (Melodic Black-Finland)
- Altitudes And Attitude (Heavy Metal-USA)
- Altjira (Thrash Heavy-Italy)
- Altkonig (Black Metal-Germany) - Other name : Altkönig
- Altlut (Atmospheric Metal-Romania)
- Alto Riesgo (Heavy Metal-Spain)
- Alto Teor De Revolta (Deathcore-Brazil)
- Alto Voltaje (Heavy Metal-Chile)
- Altona (Progressive Metal-Turkey)
- Altracent (Heavy Metal-Czechia)
- Altruist (USA) (Progressive Metal-USA)
- Altruist (ISR) (Metalcore-Israel)
- Alttar (Progressive Metal-Brazil)
- Alttari (Black Metal-Finland)
- Altú Págánach (Folk black-Brazil)
- Altum Atramentum (Black Metal-Germany)
- Altumtenebris (Black Metal-Mexico)
- Altura (Progressive Metal-USA)
- Alturiak (Black Metal-Italy)
- Alturúk (Melodic Death-Canada)
- Altus (USA) (Progressive Metal-USA)
- Altus (Stoner Doom-United-Kingdom)
- Altus Astrum (Black Death-United-Kingdom)
- Altus Mortem (Thrash Metal-Dominican-Republic)
- Altus Ultionis (Black Metal-Turkey)
- Altuun (Black Metal-Germany)
- Altvater (Folk black-Germany)
- Altzi (Hard Rock-Sweden)