[Tyhm]

Hm, can't edit anymore. Well, as much as I hate to triplepost -
Terazel came up with a good idea; it's the Outpost's survival that counts. Gather resources up to a certain point, then see which outpost lasts the longest; whichever team lasts the longest gets a prize. :-D

I'm thinking the game will start with the player being asked where they want to start, who/what they want to rescue, let them design themselves and their NPC; then they have to defend that NPC, as Sudden Death happens when a certain number of NPCs have been sacrificed to make more Zombies. Mind, once you get to the fortified outpost defending the NPC and defending the outpost works out to the same thing, and once an NPC's been abducted you (or anyone on your team) have 24 hours of Real Time to rescue them; I'm not sure what happens if another outpost rescues them, presumably they get to have one more NPC and you're off the hook...but if your NPC dies, you lose a significant boost to your stats...