If the file is present but shows a "Corrupt" or "Checksum Error," you can try the built-in repair tool: Open and locate the Lone.Echo.2.part3.rar file. Click the Tools menu at the top and select Repair archive . Choose a destination for the repaired file and click OK .
If you are missing only "part 3," the most reliable solution is to from your original source. Lone.Echo.2.part3.rar
If you cannot find a replacement for part 3 and just want to see if the game can run with some missing data, you can force WinRAR to keep the "broken" files: If the file is present but shows a
: Most sites hosting split archives allow you to download individual .rar parts. Lone.Echo.2.part3.rar