Combat in The Bard's Tale might call unique. The characters in part would be engaging in a form of square like tactical combat but also a part first person in which the occupiable squares are around the first person's interface.
Combat in The Bard's Tale IV is a turn-based tactical combat. Abilities that can be used are based on the equipped items and classes of the characters in combat. Abilities that are used enough after a certain point would eventually become a mastery in which can be used by the character even without the previous requirement to be usable isn't available anymore.