All resistances pertaining to you, the creatures you summon as well as your mercenaries and followers are 40 points lesser than on normal.
These enemies also have resistances to certain elemental attacks which means you’ll have to resort to other attacks to eliminate them.
Furthermore, these enemies deal more damage per hit and you will notice you’ll need to be a bit more mobile as compared to normal.
These enemies have buffs with more health and have increased defense to give you more of a challenge.
Moreover, this additionally means you’ll be facing more enemies.
The map in comparison to Normal will have more areas for you to scout and obtain resources and items.
Moreover, their spawn rates are higher than Normal.
Act V of the game will present enemies significantly more intimidating than Normal mode.
Here are all the differences between Normal and Nightmare Difficulty. Remember, you will have to complete the game on Normal before you can play Nightmare. You’ll face stronger enemies with increased health that deal more damage among other increased challenging situations. The Nightmare Difficulty is the exact same game, with some modifications since the level is now no longer on the basic difficulty. Advertisement Nightmare Difficulty in Diablo 2 Resurrected