https://www.polygon.com/2018/5/17/17364644/call-of-duty-black-ops-4-zombies-mode

Call of Duty: Black Ops 4’s Zombies mode will uphold the series’ tradition: four-player co-op combat against waves of the undead, along with a weird sci-fi story underneath it all, developer Treyarch announced today during a live reveal event for the game.

Black Ops 4’s Zombies component will unfurl across three different maps: IX, which is set in a gladiatorial arena; Voyage of Despair, which plays out on a certain doomed trans-Atlantic cruise ship; and Blood of the Dead, which takes place in a prison. (It’s inspired by Mob of the Dead, a fan-favorite Zombies map from Call of Duty: Black Ops 2 that was set on Alcatraz.) Players will be able to go solo with AI buddies if they can’t team up with human partners.