The official version of the game, , includes all DLC and is frequently on sale via: Steam PlayStation Store Xbox Store
Many "mirror" sites use these file names to trick users into downloading trojans or miners. NieRAutomataCPY.part02.rar
This indicates the download was split into multiple compressed archives. You need all parts (Part 01, 02, 03, etc.) in the same folder to extract the game successfully. The official version of the game, , includes