I’m sure this has been thought of before, probably many times, and if so, oh well.
Basically, this is based in a small outpost comprised 2 areas - The Freeland, and Towns
Freeland - Zombies are abundant, death follows. Freeland is the bulk of the level, where you can scavenge for supplies, and fight zombies, or set out to colonize Towns.
Towns - Consist of 4 or 5 small buildings. The Starting Town will be clear of zombies, but the other small Towns in the map will be filled with zombies. Once all zombies are cleared from a Town, it is “Colonized”, meaning you can buy barricades and traps to protect it. It is wise to travel in groups to colonize and live in town.
Supplies - In the Starting Town, there is a supplies pick-up area. These can be escorted to towns for Cooks and Weapon Dealers.
The Zombies- Common and fast zombies roam around the Freeland and uncolonized towns. They kill on sight.
So, why Colonize?**
Zombie Attacks. Zombie attacks come in waves, and if they kill the members of a colony, it becomes Uncolonized. The more Towns you have Colonized, the less force of a Zombie attack on each town. If you all hole up in the Starting Town, the attacks will be relentless. The Zombies can not De-colonize the Starting Town, but it will remain Zombie-filled until it is cleared completely.
Scavengers - Go out into the Freelands to scavenge scrap metal to buy guns and food.
Escorts - Move supplies from the Starting Town to other Towns in groups.
Cooks - Get supplies from the Escorts to keep your Town from starving.
Gun Dealers - Get guns from the Escorts to sell for protection.
Defenders - Defend your Town from Zombie Attacks.
Engineer - Build barricades and traps from scrap metal to defend your Town.
Should have about a 30 player slot.