Okay, how to explain starfire.
Starfire is a space combat system first and foremost, however it differs from most such things by allowing the player to design their own ships.
However, it doesn't end there.
It's also an empire management game. You start out with a single planet and you design your various ships (with components based on your tech level), assign resources to r&D, get new technological advances as you get higher and higher tech levels, colonize other planets, engage in espionage, meet alien races, assign resources to all sorts of things to improve your society , etc etc.
Here's a sample set of guidelines for what the ship design system looks like
http://www.spotlightongames.com/analysis/starfire.htmlSo for example an Escore (10 spaces) would look like this
SSAEIIIIII
(yeah I know... sucky design if anyone else plays, just using an example)
That would he Shield Shield Armor Armor Energy beam Ion Enginex6 It'd be a simple gunboat. Most weapons used on it would destroy the ship left to right, but the Energy beam (for example) would ignore Armor and Hull when doing damage.
Now, here's the thing, the way the game works is that from each system there are jump points that you enter or leave a system by. They take you to another system instantly more or less. So this mechanic would be perfect for the creation of a webway gate system. For Imperial and other races it'd need some sort of mechanic for warp travel.
The galaxy is typically laid out on hex paper, with lines being generated to take you between systems and the systems not being generated until someone discovers them.
If you've played anything by Task force games, you'll know that they tend to be very simulationist. Lots of detail.
Now, the thing that might make this work with epic. They also have rules I've heard in Ultra starfire that cover planetary assaults and the costs involved in purchasing ground forces.
I'm thinking of purchasing the new rules and seeing if it might provide a good rules set that could be altered to manage large scale epic empire wars.