Right-click the primary volume (e.g., part1.rar or the master .rar file).

If you are looking for a for a specific installation error.

While you can no longer buy it new, owners can still download and play it, including multiplayer modes. New players typically have to look for physical copies or, as your query suggests, unofficial download sources. Risks of Unofficial Downloads

Searching for specific game files like "tnzyl forza horizon 4 1472876rar 313 jyja"