You cannot open "part10.rar" in isolation. You must have all parts (e.g., part01 through the final part) in the same folder.

A journey where Bayek investigates a curse bringing undead pharaohs back to life. Key quests include "Aten Rising," "The Heretic," and "The King of Kings".

If you successfully extract this and all other required parts, you will gain access to the following content from Ubisoft's second major expansion for Assassin's Creed Origins :

Battles against undead versions of famous pharaohs such as Ramesses the Great , Akhenaten , and Tutankhamun .

Approximately 8 hours for the main story and up to 15 hours for 100% completion. Technical Note on Multi-Part RARs