Call of Duty: Black Ops 6 is releasing its brand-new Zombies map, Citadelle Des Morts, on Thursday, December 5. Call of Duty: Black Ops 6 has enjoyed a great deal of success since its launch at the end of October. Developer Treyarch and publisher Activision have kept the game's momentum going strong with post-launch content like the return of the popular Nuketown map and the start of Season 1.