This is a summary of the video transcript:
The video explains the long history of the Nier series, which is derived from the ending of Drag-on Dragoon, a game where a man and a dragon fight against a god who wants to destroy humanity. The video covers the events that happened in different timelines and worlds, such as the appearance of white monsters called Legion, the Gestalt plan to save humans from a disease, the creation of Replicants and androids, the invasion of aliens and machine lifeforms, and the final war that ends with the destruction of the human server on the moon. The video also mentions some mysteries and secrets that are related to the series, such as the identity of the true god, the existence of Cole, and the origin of magic. The video concludes by recommending the new game Nier Replicant.
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