If you are missing part4.rar , the entire archive will fail to extract, as multi-part RARs require every segment to be present in the same folder.
The release was highly anticipated as it bypassed Denuvo anti-tamper protection shortly after the game's launch. SOULCALIBUR.VI.Deluxe.Edition-CODEX.part4.rar
Block the game's .exe in your firewall to prevent it from going online. : If you are missing part4