Rules and scenarios for Ancients battles. King of Kings (itself later republished by 3W as Imperator) was a companion game. Available for free download at this url: http://home.comcast.net/~mpnagel/Relative_Range/Ancient_Batt...
As of August 6th 2016 the previous link is dead. Last archived version can be found at: http://web.archive.org/web/20150216114730/http://home.comcast.net/~mpnagel/Relative_Range/Ancient_Battles_Deluxe.html
An new version of the old website could be found at http://www.relativerange.com/#!ancient-battles-deluxe/a4loq although it contains the rules for Ancient Battles Deluxe, not for Ancients.