You see, Pool of Radiance and Curse of the Azure Bonds were the first games to use branded TSR AD&D rules to power the game... so you had an adventure component with 3d sort of FPS view and story, then when you had combat this switched to a tactical isometric view where turn by turn you would assign actions i.e. aim, cast, move etc (see Remembered Realms: Revisiting SSI's Legendary Gold Box Games