Approximately 824 MB to 897 MB , depending on the compression and included extras (like the soundtrack or artbook).
Open the extracted folder and look for an executable file, typically named setup_shadowrun_returns_1.2.7.exe . File: Shadowrun.Returns.v1.2.7.zip ...
Double-click the setup file, follow the installation prompts, and accept the EULA to complete the install. Safety & Verification Approximately 824 MB to 897 MB , depending