If you are having trouble with the extraction, please tell me: What are you getting? Are you using 7-Zip ? If it's about the game itself, How to Easily Open 7z Files on Windows
If the extraction fails, it means one of the parts is corrupted or missing. Common Issues File: COM3D2_EN.7z.012 ...
Once extracted, you will likely have an .exe file or a set of game files to run the game. If you are having trouble with the extraction,