Just so we're all on the same page:

Classic Warlords 2 had 5 campaigns. There was a campaign editor expansion that included a number more, I believe 24. The Warlords 2 Deluxe added a ton on top of that. The originals were:

Dragon Realms
Isles of Sorcery
Erythea Campaign
Hadesha Campaign
Isladia Campaign

Does anyone know which campaigns came with the original campaign editor as opposed to the Deluxe release?

And just in case anyone's curious, for Warlords 3, the original campaign from Reign of Heroes is The Banewars. The others are all from DLR.

I have the following list for the Scenario Builder from an old book on PC games. It may not be 100% correct (in particular when it comes to spelling), so it would be good to verify it at some point.

America
Arthurian Britain
Chessworld
Elemental Crux
Elemental Problems
Esesgee Island
Europe
Flooded Halls
Glacial Isles
Hand of Fate
Invasion
Isle of the Wheel
Jungle Valley
Knight's Isle
Landlords
Minotaur Maze
Roman
Rule Britania!
Selentia
Spectremia
Spindle Isle
Star
The Well
Warthogs 2

That adds up to 24, looks like you got it right. Thanks!

There's one more thing I found: Apparently, SSG had an in-house magazine called Run 5 back in the day, which included the original Warlords 1 Illuria scenario for Warlords 2 in issue 20, even before the scenario editor got released.

It is also included in WL2 Deluxe.

http://www.ourdigitalheritage.org/archive/playitagain/wp-content/uploads/SSG-Run-5-Issue-20.pdf

There were at least two further SSG scenarios for WL2 Deluxe released on Run 5 disks: One called Underworld, and another called Korea. After issue #25, Run 5 seems to have been continued online on the SSG website, but I have no idea if any further official scenarios were released.