One of the hallmarks of Call of Duty for over a decade has been the Zombies mode. What was once a terrifying surprise at the end of World at War's campaign has cemented itself as one of the most influential game modes in the industry, and Call of Duty: Black Ops 6 looks to include one of the most ambitious iterations of Zombies yet. Developer Treyarch has offered deep dives into how Call of Duty: Black Ops 6 is expanding on the undead action, while also bringing it back to basics. From round-based matches to the return of classic perks like PhD Flopper, there already looks to be something for everyone to enjoy.