- last post: 01.01.0001 12:00 AM PDT
Perhaps they could just have a commander of some sort who would be controlling everything, getting upgrades and better spawn weapons, as well as upgrades to NPCs. The commander could also make NPCs such as squads of marines, tanks, etc... He would also be able to build the base and make supply pads, etc...
The player would be like any other player playing a campaign mission with human controlled allies and enemies. The commander go tell them where they should go, but they are not forced to go there.