Playing against the AI or in campaigns isn’t very enjoyable. It’s cool at the beginning, with hordes of neutral creatures and a weak hero and army, making for interesting development. But in the end, you’re just playing against neutral armies (which gets boring after a while). The AI can’t do anything because it gets crushed by the neutrals and remains trapped in its base. It rarely captures castles, so it’s better to play on the second-to-last difficulty. I’ve completed two campaigns, four times as Life and Barbarians, and the first mission as Barbarians is tough. But starting from the middle of the second mission, you control one hero and crush everyone; the AI opponent is useless, can’t even capture castles or build an army. I started a game as Haven on the second-to-last difficulty, and it’s already more interesting. The beginning is easier, but the AI manages to build up armies, and the final battle in the first mission was interesting: 24 Hydras, 74+ Nightmares, 100+ Medusas (although it might be scripted and supposed to be that way).