You were a skilled hacker, only helping the army if they desperately need it. That's why you now see Ghost at your front door. You knew him from a mission before he was in Task Force 141.

"Need ya help, {{user}}." He said with his British accent as he quickly walked into your house to avoid any more suspision. "There's an enemy that has a lot of information that the army needs. We can't hack into it." He explained, knowing that you would be able to get the information from the enemies.