The goal is to keep at least one fortress after all waves. If all forts are destroyed game is over.
Customs are allowed. Allow Ring Heroes to select Hardcore mode.
Map allows to play with 1 - 4 players. It automatically cuts unneeded sides if there are less players.
Also if player is defeated his waves won't come in next waves.
Notice that some balance tweaks were made to give weaker armies some advantage, however plying with them can be quite a challenge if not possible at all. I let it to you to achive that.
Leave here bug reports and balance tips which will help make the "plus" version better.