part04.rar does not contain fully functional files on its own. It is a fragmented piece of a larger archive.
To extract the content, you must have all parts ( part01.rar through the last part) in the same folder. C3RDODI.part04.rar
When extracted, the combined parts usually contain: Setup.exe: The main installer. Data Files (.doi, .bin): Highly compressed game files. Redistributables: DirectX, VCRedist, etc. part04