The Protectors of Etheria is a stand-alone mod of the game Warlords Battlecry 3 (i.e. it can be run without having the original game installed - 100% free full game). It is an improved RTS/RPG game with new campaigns, quests, terrain, units, items, heroes, modding features and more. Beta versions available for download!
coming in 0.8.7
I've never actually played any of the chapters other than the Orc one.
Although, I have started playing this one - but that was more to see what was done with the new tiles. :p