The most challenging campaign.

At first, the second mission for the Demon faction seemed difficult. But after changing my tactics 10 times, I managed to complete it in record time – 3-4 weeks, I don't remember exactly. And once I completed it, it seemed easy. The next time, I encountered an obstacle in the third mission for the Dark Elf faction – conquering the Clan of the Grim Heart. I couldn't complete it and put the game aside for two years. After struggling for 10 hours, I found the right tactic – I replayed it and completed it. And the last mission – the moment where you have to defeat Kha-Beleth. I didn't immediately realize that Raileigh had a ballista. Because of this elf, I kept losing (the archers were quickly eliminated), but once I removed the ballista, it was easy (an upgraded ballista and Chaos magic – minus 15 archdevils per turn). So, I stumbled three times. I played through it with a hero, of course. I started on version 1.0, then uninstalled it and started again with version 1.5. In reality, once you've completed it once, the campaigns seem easy because you can repeat it easily. But I enjoyed the game. I had to think. The most challenging campaign was from Heroes of Might and Magic III. Now I can finally play through the Hammers of Fate.