List of bands (3):

Any Given Day
Apocalyptica
Arch Enemy
Archspire
Arion
Arktalas
Armored Saint
Artificial Brain
Artrosis
As I Lay Dying
As The Sun Falls
Ashes of Ares
Asking Alexandria
Astral Doors
At The Gates
Atavistia
Atreyu
August Burns Red
Austrian Death Machine
Autopsy