Just after hanging up, you might deal with the final battle During this mission. Head to the next floor to gather some ammunition — they can turn out to be useful inside the upcoming struggle. Be attentive and careful, as zombies will seem endlessly till you defeat the main mutant. https://call-of-duty-black-ops-681592.suomiblog.com/little-known-facts-about-call-of-duty-black-ops-6-gameplay-walkthrough-campaign-49569514