Here we will post links to guides which players have created. If you know of a guide not listed here, or want your own guide listed here, let us know!
bigh's Achievement Guide - A guide detailing how to claim all of the achievements available in Demise of Nations.
X4MHD's Becoming an Emperor guide - A guide detailing many aspects of the game. Probably mostly applies to the Legacy maps these days, as it was written quite some time ago!