<blue> At the moment, players are not actually required to complete the entire game in Campaign Mode before unlocking Adventure Mode. Whether or not it stays that way is another matter, but for the moment we’re allowing you to unlock each Act, one by one. So, complete Act I in Campaign Mode on one of your characters, now you’ve got Act I unlocked in Adventure Mode. Complete Act II on one of your characters in Campaign, boom — Acts I and II are now unlocked in Adventure Mode. And so on. Completing an Act in Campaign Mode would also unlock that Act in Adventure Mode for all your characters on your account, not just the one who completed in Campaign Mode.</blue>  Adventure mode is a flat difficulty and is scaled to your character(dynamic difficulty), there are no difficulty settings such (normal, nightmare etc)<ref name=bountydetails/>