Campaigns or scenarios.

But even so, 5-hero parties couldn't compare to what mapmakers created in Heroes 4... ah, what an amazing editor it had – convenient, simple, yet functional, unlike the one for Heroes 5. And in general, just remember those awesome RPG scenarios-campaigns like "Dronchik" or "Krasavchik Joe"... there were many of them, and in many, they didn't hesitate and created storylines with a volume of 3-4 A4 pages... ah.
P.S.
I'm currently working on a campaign for Heroes 4, doing it slowly because I've always had problems with design – it was okay, but before it became that way, I had to think a lot and spend half an hour deciding whether to put a flower here or a hill or another type of terrain.