Call.of.duty.modern.warfare.part25.rar -

You need part01.rar all the way through to the final part (which could be Part 50, 100, or more depending on the source).

Because this is , it indicates that the total file size is quite large, which is standard for Call of Duty: Modern Warfare . Here is what that file is and what you need to do with it: What is a "Solid" Archive? Call.of.Duty.Modern.Warfare.part25.rar

It significantly improves the compression ratio, making the final file size smaller. You need part01