Basically, a total conversion for Medieval 2: Total War Kingdoms. The entire campaign is replaced, all factions are playable, Evil vs Good Alliances work etc. The units are massive, the trolls are scary and the Elves are shooty. After I ambushed a Gondorian column with my Nazgul and a horde of orcs running out of the forest, with my Nazgul cutting down the Steward of Gondor in single combat, I was convinced that I probably won't play any other Medieval mod any more.
Currently playing a Mordor campaign, installed a little submod called "Immortal Nazgul" - basically every time the Nazgul die, they respawn next turn at Barad Dur but losing any experience they gained. The Black Land is churning out about ten thousand orcs per turn and throwing them at the elite Gondorian troops, and I'm losing about 5 to 1, but by the Gods I have more Orcs than they have Men.
Edit: Damn you Coey!