You cannot use .004 alone. You must locate and download parts .001 through .003 (and any subsequent parts).
To ensure the file is not corrupted, preservationists use hashes (like MD5 or SHA-1). If part .004 is modified by even one byte, the entire archive will fail to extract, ensuring the integrity of the data. 4. Technical Requirements for Use RocketRobotKorea.7z.004
The name strongly suggests a connection to , a platformer developed by Sucker Punch Productions (the creators of Sly Cooper and Ghost of Tsushima ). You cannot use