Final.fantasy.xiii.part12.rar -

: Ensure you have every numbered part (e.g., part01.rar through part12.rar and beyond) in the same folder .

: If part 12 is the last one you have but the program asks for "part 13," you are missing a file. Final.Fantasy.XIII.part12.rar

: If you get a "CRC failed" error, one of your parts (possibly part 12) was damaged during download. You can try the "Repair" function in WinRAR or re-download that specific part. Final Fantasy XIII: Chapter 12 Gameplay Guide : Ensure you have every numbered part (e

You cannot open or extract part 12 by itself; you must have all parts present to rebuild the original file. You can try the "Repair" function in WinRAR

If you are actually looking for a guide to of the game (Eden), here are key strategies from expert walkthroughs on IGN and GameFAQs :