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Year 2081. Humanity survives among ruined cities after a neurological virus turned people into violent infected zombies, not undead. Common types include Sleepwalkers, Runners, Stalkers, Howlers, Climbers, Bruisers, Mimics, and Crawlers. Major human groups are Riders, Hunters, Reclaimers, Fortress Settlements, the Iron Covenant, the Shepherds cult, and New Dawn Authority.