Character Bios are records of certain characters telling their backstories, facts and attributes. They appear in every game excluding mobile games except for Batman: Arkham Origins Blackgate. There are 42 bios in Batman: Arkham Asylum, 32 in Batman: Arkham City, 32 in Batman: Arkham Origins, and 38 in Batman: Arkham Knight.
Arkham Asylum Character Bios[]
The following characters have bios unlockable/automatically unlocked.