If you dug Call of Duty, you'll dig United Offensive, but get comfortable with the Quicksave and Quickload keys. In This Article. Call of Duty: United Offensive. Pi Studios Sep 14, 2004 Note: Call of Duty ™: United Offensive ™ has its own CD key, separate from Call of Duty. ™ Your Call of Duty ™ key will not allow you to play. Call of Duty ™: United Offensive. ™ When prompted, enter the CD key as it appears on the jewel case. It’s important that you observe the following guidelines to ensure the privacy of your DSOtE7.

call of duty united offensive key