This is where cheat codes come in handy. :) I wonder if Nival played their own creation. And I wonder who won, Nival or the computer.

I, for example, easily completed the first 4 campaigns on medium difficulty. No codes are needed there; just keep your hands off, pardon me, [censored]. :D In the first mission for Dungeon, you just need to accumulate enough strength and then wait for the enemy heroes to beat each other up in the arena. When only one, already beaten and without mana, remains, you need to finish him off and take the ring. And the fact that the missions are difficult is a plus! There's no need for every newbie to play Heroes of Might and Magic 5; let them learn.