– If this is part .009 , there are likely earlier parts ( .001 , .002 , …, .008 ) and possibly a .010 depending on the total size. The archive won't extract unless you have every part in the same folder.
Here's a breakdown of the subject:
These types of archives are typically used to distribute the raw game files needed for the RPCS3 PlayStation 3 emulator. God of War: Ascension - Game Overview God of War Ascension -Gnarly Repacks-.7z.009