Redout.space.assault-codex.part3.rar -

Double-click the game's executable (usually RedoutSpaceAssault.exe ) in the installation folder or use the desktop shortcut.

Right-click "Redout.Space.Assault-CODEX.part1.rar" and select "Extract Here" (using WinRAR or 7-Zip ). Redout.Space.Assault-CODEX.part3.rar

Multi-part RAR files are a single archive split into smaller chunks. You do extract each part individually. Redout.Space.Assault-CODEX.part3.rar

Verify you have all parts (e.g., part1, part2, part3) in the same folder. Redout.Space.Assault-CODEX.part3.rar

Inside the mounted ISO or the initial extracted folder, look for a folder named CODEX .

Open the virtual drive (or the extracted folder) and run setup.exe .