Another idea, kind of linked to the one below:
How about if two players could control a planet at once? Habitat facilities A, B anc C are yours, C, D and E are yours. Space yard X is mine, Y is yours.
How cool would ground combat be with this? Could lead to some interesting treaty situations too.
Have I had my "designer treaties" rant on this thread yet? I'll let you all digest this lot first...
