United Offensive is an expansion pack . If you download a standalone .rar , it may not work unless you already have the original Call of Duty (2003) installed and patched to the correct version. 2. The Recommended Path (Digital Retailers)
You avoid the risk of viruses associated with cracked .rar files. download-cod-united-offensive-rar
If you already own the physical CD and are just looking for a "digital" version because your modern PC lacks a disc drive: United Offensive is an expansion pack