While it may lack a traditional single-player campaign, Call of Duty: Black Ops 4 does feature its standard multiplayer suite, as well as the new battle royale Blackout mode and Zombies. The latter comes in several forms, including the new Rush mode that expedites things (giving you free guns and unlocking doors for you).
In the video above, you can see some gameplay from the new Zombies mode's Blood of the Dead map. This is a take on Black Ops 2's Mob of the Dead map and is set inside a prison.