Alice wrote: ↑
I don't recommend Nightmare though, personally I find that mode boring since it removes most of the point of actually exploring.)
Actually if you're coming back to the game after a break and you want to do a second run, nightmare mode could be a good alternative because if you collected everything in your first run, you might find it tedious to do all that again in your second run. It allows you to skip many side tasks and focus straight on the main path, which is one way it's a quite different experience.
And fortunately, if its increased difficulty is too high but you're curious about how different it feels, you can balance it out with