How about an NPC character (Golems?) that can be given simple tasks like ‘collect wood’ etc… and actions like ‘run away from zombies’, ‘attack zombies’. Should be able to be equipped with armour/tools. Will drop gathered materials at designated boxes. Then we’ll get populations happening
Should maintain players names, and perhaps have a custom colour to their clothes.
Should be expensive, probably made out of blood, meat, cloth, and radioactive chewing gum?