As seen in the case of Call of Duty WW2, Treyarch also decided to plan a day one patch for Call of Duty: Black Ops 4, forcing users to download it before starting to play, even if they had a retail version with a few days before the launch.
As you can see in the tweet reported at the bottom of the news, a user with the retail version of Call of Duty: Black Ops 4 tried to start the game, coming across a warning screen that requires downloading an update before starting to play.
In this way, therefore, Treyarch Games will prevent anyone to start playing Call of Duty: Black Ops 4 before the launch, scheduled for October 12 on PlayStation 4, Xbox One and PC. Only from the official debut date of the title, in fact, the developers will make available the day one patch, allowing everyone to download it and start the game.
If you are curious to know how much space Call of Duty Black Ops 4 will occupy on disk, in the second tweet at the bottom of the page you can see the back cover of the game (PlayStation 4), where it is specified that the game will require at least 100GB of free space on the hard disk.