Nation War — HotA 1.3.0+

Nation War is a giant underground map of 252 by 252 tiles, built for Horn of the Abyss 1.3.0 or later and rated hard. Eight players share the field, each playing a different faction from Tower to Necropolis, and all eight can be human. The players form three teams, and victory comes from defeating every enemy, while a player loses once all of their towns and heroes are gone. Rock covers about half the map and water roughly a third, so movement depends heavily on boats and passages. The surface is dotted with twenty towns, 108 mines, 31 creature banks and 14 monoliths and portals, along with wandering Water Elementals, Sea Serpents and Firebirds. Nine random artifacts are placed on the map as well.