Demon lands.

I agree with both points made by the previous forum user. The landscape is indeed too simplistic, the terrain is flat and unnatural, and the AI is too cowardly :( and only fights when a guaranteed victory is assured. I also wanted to note that the neutral creatures are not distributed logically – powerful artifacts (Mantle of the Underworld, Dragonscale Boots, King's Axe, etc.) are guarded by very weak monsters, while a couple of pieces of sulfur or ore are defended by much stronger ones. Also, I wanted to point out that the defense of the shipyards needs to be strengthened (or the opposing sides need to be separated in some other way); otherwise, the enemies arrive as early as the beginning of the third week. You can defeat them, but in that case, you won't have time to open even half of the hidden locations, let alone combine the forces of both castles (even on the mini-map of the introductory cutscene, a dark line is clearly visible). And after the first defeat, further messing around in your own little sandbox becomes uninteresting and pointless, and the main heroes sail off to deal with the enemy, while the undiscovered hidden locations become unattainable. By the way, the island treasures, which the demons should theoretically seize, also turn out to be unwanted. Perhaps it will be different if you play on a different difficulty level, but on "Hero," it is exactly as described.