To be upfront, is not a scholarly topic or a formal document; it is a compressed archive file typically found on file-sharing or torrent sites.
Ensure you have part1.rar , part2.rar , etc. Use an extractor: Use software like WinRAR or 7-Zip . Mass.Effect.3.part3.rar
Large games like Mass Effect 3 are often split into smaller "parts" (part1, part2, part3, etc.) to make downloading or uploading easier. To be upfront, is not a scholarly topic