You must use software capable of handling split 7-Zip archives, such as 7-Zip (Windows) , The Unarchiver (macOS) , or PeaZip [1].
The file is the first part of a multi-part 7-Zip archive, likely for the game Gunner, HEAT, PC! (GHPC) [1, 2]. Here are the key features for handling this type of file: Download File ghpc.7z.001
It is crucial that all parts are downloaded completely and without corruption for the extraction to succeed [2]. Do you have all the parts downloaded? If not,Also, You must use software capable of handling split