Horizon Zero Dawn is an action role-playing video game developed by Guerrilla Games and published by Sony Interactive Entertainment. It was released for the PlayStation 4 in early 2017. The plot follows Aloy, a hunter in a world overrun by machines, who sets out to uncover her past. The player uses ranged weapons, a spear and stealth to combat mechanised creatures and loot their remains. A skill tree provides the player with new abilities and bonuses. The player can explore the open world to discover side quests.