Nobody does Risk-like games as well as Sillysoft; Lux Delux, their flagship product, offers hundreds of different maps, along with a plugin downloader that can pull down hundreds more made by fans. Sort of taking the basic dynamic of Risk and doing everything possible to extend it into the Internet realm.
What Ancient Empires Lux (like its predecessor, American History Lux) does instead is provide you with a series of levels based on historical conflicts--along with notes on those conflicts--and lets you play them out.
