How does zombies mode work?

[Bill the Butcher]

Is it PVE co-op?

[Inari]

Like it is, its a zombies mode with like 1-4 players. You all work together to just survive. You activate one generator per round that will open a door and let you progress. Youll find long boxes scattered around that will random spawn weapons which reset every 2 rounds or something. There is a whole progression to it to an extent to figure out the way to the top floor to free the elevator that can take you down to the basement. Use the cameras to unlock the gun room on the second floor. From there just survive as long as you can till you die then repeat.

[Inari]

basically old school CoD zombies