: Go back to the original site or folder where you got the files. Archive parts are specifically indexed to work together; a part from a different "repack" or version will not work.
Are you seeing a specific (like "Unexpected end of archive") when trying to extract these files? Grand.Theft.Auto.Epizodes.From.Liberty.City.par...
: If you have the original "Episodes from Liberty City" standalone discs, you can often register the CD key on the Rockstar launcher to download a digital, working copy. : Go back to the original site or