NieR: Automata, the popular action RPG game, takes place in a post-apocalyptic earth overrun by killer robots. The game is part of a larger series of games and media that began with Drakengard in 2003. Drakengard is set in a world similar to our own but filled with magic, where demonic beings known as The Watchers are attempting to break into the parallel earth. The protagonist, Prince Caim, opposes them with the help of a dragon named Angelus. The game has multiple endings, with the final ending revealing that Caim and Angelus are transported to 2003 Tokyo and shot down by fighter jets, leading to the near-extinction of humanity.
NieR, released in 2009, takes place in a post-apocalyptic world where humanity has been reduced to pillars of salt due to the effects of a disease called the White Chlorination Syndrome. The surviving humans create clones called Replicants to combat The Watchers. The game follows the protagonist Nier as he searches for a cure for his sister’s disease. It is revealed that Nier himself is a shell body created as part of the Replicant program and his true self, the Shadow Lord, is controlling him. The game introduces android characters Devola and Popola, who also appear in NieR: Automata.
NieR: Automata is set approximately 8,000 years after the events of NieR, with different protagonists and a focus on the YoRHa androids. YoRHa is a militant organization based on the moon tasked with destroying the machine lifeforms that have taken over earth. The androids have advanced abilities and fight against the machines in their 14th war. However, there are hints that the machines may have a connection to the previous games, as seen in the cybernetic brain programming that is in English and the androids’ display of human qualities under stress. It is also revealed that the Red Eye Disease, which was previously used by The Watchers, can infect the machines.
Overall, the lore of NieR: Automata is connected to its predecessors, Drakengard and NieR, creating a rich and complex world filled with magic, warfare, and the struggle for survival in a post-apocalyptic setting.