Horizon: a far-future Earth full of epic natural beauty and forgotten ruins, where awe-inspiring, animal-like machines are the dominant species and humans struggle to survive in pre-industrial tribes. Set during the events of Horizon Zero Dawn, Erend and Aloy are on the hunt for the killer of an important member of the Oseram tribe, fending off deadly machines along the way. As the hunt progresses, Erend reveals the sweeping tale of the liberation of Meridian, and how his sister, Ersa, Captain of the Carja Vanguard, was murdered.