Re: Dominion-level Games
No, I hadn't seen King of Dragon Pass, but although it's based on Runequest, an old pen and paper RPG, this seems to be a computer game.
The sort of game I have in mind is one where the players are the lords or ladies of one or several kingdoms and by means of court intrigue and/or battlefield glory are attempting to increase their power and holdings to the point where they might influence the outcome of international wars, either by supporting their lord or by switching sides, and they might even become powerful enough to make a bid for the crown. The kings would probably have to be NPCs to avoid imbalance.
Such a game would probably need three linked rulesets - one for personal role-play in intrigue or personal combat, one for skirmish combat on a battlefield, and one for map level strategic conquest. There would also need to be some form of economic base to determine the number of followers and amount of cash available, but this would need to be abstract enough to avoid spreadsheet tracking.