SCUM horde mod first preview.
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What this mod does is adds a spawner "far" away from the player character and allows zombies to spawn in the wild. Its truly random where they will spawn. Take note that server owners will be able to configure this mod.
At the moment there is only one type of NPC that spawns. I will soon be adding other types of NPCs. I also will be adding a "spawn in cluster" feature before release.