- Savatage (Progressive Heavy-USA) - Other name : ex-Avatar, ex-Alien, ex-Tower, ex-Metropolis
- Alien (SWE) (Hard FM-Sweden)
- Alien (UK) (NWOBHM-United-Kingdom)
- Alien (USA) (Heavy Metal-USA)
- Alien (FRA) (Heavy Rock-France)
- Alien (CZ) (Heavy Metal-Czechia)
- Alien Ant Farm (Nu Metal-USA) - Other name : AAF
- Alien Autopsy (Industrial Death-Ukraine)
- Alien Avenge (Melodic Death-Taiwan)
- Alien Boys (Doom Metal-Germany)
- Alien Conspiracy (Black Death-USA)
- Alien Cow Abduction (Grindcore-Mexico) - Other name : AxCxA
- Alien Crucifixion (Technical Death-USA)
- Alien Deviant Circus (Industrial Black-France) - Other name : ADC
- Alien Disembowelment (Brutal Death-South-Africa)
- Alien Force (Heavy Metal-Denmark) - Other name : ex-Zeyking
- Alien Fucker (Porno Gore Grind-Israel)
- Alien Gods (Black Death-India)
- Alien Nation (Heavy Metal-Germany)
- Alien On My Mind (Progressive Metal-Germany)
- Alien Possession (Thrash Speed-Netherlands)
- Alien Queen (Death Doom-United-Kingdom)
- Alien Squad (Thrash Metal-Portugal)
- Alien Syndrome 777 (Avantgardiste Black-Italy)
- Alien Vampires (Black Electro-United-Kingdom) - Other name : AV
- Alien Weaponry (Thrash Metal-New-Zealand)
- AUX (Speed Heavy-Czechia) - Other name : Alien's Uncle X
- Aliena (Melodic Heavy-France)
- Alienacja (Deathcore-Poland)
- Alienante Damnation (Brutal Black-Belgium)
- Alienated (Heavy Metal-Germany)
- Alienated (IND) (Brutal Death-Indonesia)
- Alienation (CHL) (Thrash Death-Chile)
- Alienation (USA) (Death Thrash-USA)
- Alienation Cold (Atmospheric Black-Russia)
- Alienation Mental (Death Grind-Czechia)
- Alienatör (CAN) (Sludge Metal-Canada)
- Alienator (BRE) (Thrash Metal-Brazil) - Other name : Thrash
- Alienchrist (Black Metal-France)
- Aliene Ma'riage (Visual Kei-Japan) - Other name : Aliene Ma?riage
- Aliengates (Melodic Death-Switzerland)
- Aliens And Me (Screamo-Russia) - Other name : AAM
- Aliens Ate My Setlist (Post Hardcore-Germany) - Other name : AAMS
- Aliens Eat My Girlfriend (Deathcore-Germany) - Other name : AAMG
- Aliens Will Back (Hard Rock-Italy) - Other name : AWB
- Aliens' Structure (Industrial Metal-France)
- AlienZ (Progressive Metal-Lebanon)
