THIS!

I wanted and forgot to do this, although it's not strictly a Games of Yore.

In my eyes the best "Civ" of all. Very differently feeling factions, gameplay changing a lot in the phases of the game because of terraforming and the PSI stuff.
Then the military. Great variety that really worked together (and against :D). Not to mention the possibility of flooding an enemy city per terraforming or making it rain on your tiles and dry as hell on theirs.