Campaigns or scenarios.

It's the same. But I'll say this - we can praise the developers for moving away from a huge number of scenarios (how many were there in Heroes 3? Only 7 campaigns in RoE! Add to that about a hundred additional maps) and focusing on quality over quantity. I especially liked the regular single-player maps, and the campaign wasn't that bad either. Yes, and here's another thing - there was a comment about how difficult the Heroes 5 editor is. I tried to learn the Heroes 4 editor. My first thought was: "Good Lord, how is everything so complicated?" Especially annoying was the fact that you had to move an object onto the map - the developers made it much easier. As they say: "Cheap, reliable, and practical!"