: You cannot open this file by itself. You must have every single part in the sequence (Part 1, Part 2, etc.) saved in the same folder on your computer.
This is the of a multi-part compressed archive (likely a .rar or .zip set). In large game downloads, files are often split into smaller "parts" to make downloading easier and to stay within file size limits of hosting services. How to Use It game-battlefleet.gothic.armada.2-(41527).part12...
: If you get a "Checksum Error" during extraction, it often means one specific part (like Part 12) didn't download correctly. You would need to redownload just that specific part. About the Game : You cannot open this file by itself