The most straightforward way to force the Call of Duty HQ into offline mode is to cut its access to the internet before launching.
If none of the above fixes work, you may need to consider alternative solutions:
If you are connected to the internet but MW3 forces you into an offline loop or says "Fetching Online Profile" indefinitely, use these verified fixes. Fix 1: Check the Activision Server Status
To ensure your game never locks you out when you lose internet connection, keep these habits in mind: