The free-to-play and cross platform experience, Call of Duty: Warzone, is available to download now, for free. You do not need to own the full version of Call of Duty: Modern Warfare to download, play and enjoy Warzone. Call of Duty: Warzone is free for everyone.
Can you play the PS4 Black Ops 4 offline? Yes you can & you will have to play against or with bots but you can play both the maps and the zombies or customize your own game. You wont be able to rank up and Prestige in both the Multiplayer and Zombies side but you can still have fun and learn the maps or games.