: If the repair fails, Part 11 is likely corrupted. You should redownload just that specific part, preferably from a different mirror if available.
: You must have all parts (Part 1, Part 2, ... through Part 11 and any others) in the same folder. If Part 11 is the last one, ensure the previous 10 are present. Killing Floor 2 [DODI Repack].part11.rar
: Use the latest version of WinRAR or 7-Zip. Older versions often throw "Header Corrupt" or "Unknown Compression Method" errors. : If the repair fails, Part 11 is likely corrupted
: Compare the size of your Part 11 to the others. Usually, all parts (except the last one) are the exact same size. If Part 11 is significantly smaller than the rest (and isn't the final part), it likely didn't download completely. through Part 11 and any others) in the same folder
Are you getting a specific like "Checksum error" or "Unexpected end of archive"?
: All files must have the exact same name except for the part number (e.g., Killing Floor 2 [DODI Repack].part01.rar ). If you renamed one, the extraction will fail.