Immediately after hanging up, you can deal with the final battle During this mission. Head to the next floor to gather some ammunition — they're going to come in handy in the impending struggle. Be attentive and cautious, as zombies will appear endlessly until eventually you defeat the principle mutant. https://call-of-duty-black-ops-614680.bloggactif.com/35234210/an-unbiased-view-of-call-of-duty-black-ops-6-gameplay-walkthrough-campaign