Slitherine

For those wanting to increase their scenario pool or just wanting to play a particular campaign scenario to see what it is like.
Simply load one via the Editor.
You will start with some base units but plenty of prestige.
Of course, you can even modify all that in the Editor before hitting Play.

Does this work for multiplayer? Can we play the campaign maps in MP?

I can't see why not, as long as you tweak the parameters, but they're not even remotely balanced for that.