Not sure if this will be of any use but has anybody played the old RTS game: Alien vs Predator - Extinction?
Years ago i had the same kind of idea and this game gave me a mountain of ideas that could carry over into a tabletop wargame.
Still can't believe there is not a full line of miniatures available for the AVP Universe yet!
People always say: AVP does not have enough troop types etc. BULLDUST!
Play Alien vs Predator: Extinction for a few months and read all the weapons data files in the game!
Could be a massive game if it was given a chance.
Only the insane have the strength to prosper.
And only those that prosper truly judge what is sane.