ellada
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It seems the issue is with maps in the format of The Shadow of Death (a later version). Download The Shadow of Death (3.2) or the Platinum Collection from Booki (Complete Edition 4.0), which is the same thing.
That's exactly what happened. I installed the Platinum Collection, and all the maps are visible:smile26:
Overall, I really liked the game, but my skill level was very low, and I kept losing.
Tutorial video on how to play Heroes 3 is still relevant:smile20: