To run the extracted game successfully, your system should meet these requirements:
You can adjust settings like FOV or windowed mode in the ConfigUser.xml file located in %LOCALAPPDATA%\Risen3\Config\ . Risen.3.Titan.Lords.GOG.part2.rar
2.4 GHz Dual Core (Minimum); Intel Core i5 @ 2.5 GHz or AMD Phenom II x4 940 (Recommended). To run the extracted game successfully, your system
4 GB RAM minimum for the 64-bit version; 8 GB recommended. Storage: Approximately 8 GB of available space. Graphics: NVIDIA GeForce GTX 470 or AMD Radeon HD 5850. Usage Notes To run the extracted game successfully