I just read a topic about a new kind of FFA. Where you like 8-10 planets and 7-8 players. The number of players will be unknown and if the planets turn you will have different opponets as the planets turn. (viewtopic.php?f=61&t=34266) That made me think, how about a game mode with the Secret mission game mode in Risk. When the game starts give all players a objective. As example, capture 4 planets, capture the 1st, 3rd and 5th planet, kill the red player.