Horizon is set in the 31st century on a post-apocalyptic Earth where the planet is teeming with robotic animals and primitive tribes. The game shows glimpses of what life was like before the apocalypse through a device called the Focus. The Focus is how Horizon protagonist Aloy learns about the past, and in the first game, she discovers a woman from the 21st century known as Elisabet Sobeck. Players learn about Elisabet through holograms and audio logs that Aloy finds.