Dragon Age: Inquisition - Guide To Completing A Nightmare Difficulty Playthrough

"Dragon Age: Inquisition has a Nightmare difficulty mode available for players that want a big challenge. What the difficulty does to the game stats is basically buff up the enemies. However, players can add other difficulties as well if they bought the Trespasser DLC, as that unlocks trials (such as giving enemies access to more abilities and/or buffing up only bear enemies)." - click image for article