You must have all parts (Part 1 through the final part) in the same folder to extract them.
Files like part1.rar , part2.rar , etc., are pieces of one large game. download-football-pes-2021-apun-kagames-part2-rar
💡 If the extraction asks for a password , it is usually the name of the website where you found the link. You must have all parts (Part 1 through