On Ebay, I bought the CoD Black Ops bundle with the first strike DLC included for BO1. So I put BO1 in my XBox1 and come back a little while later to play and see no sign of the DLC. I even put the cheat codes in in the main menu and all that but nothing happened. I just came back and finally decided to use the app manager to see if it was there but it isn't. How do I get my free DLC?