Call of Duty: Black Ops IV is a payed game, which you need to purchase as a disc (physically) for your Xbox One/One S/Series X or digitally on the Microsoft Store, for any Xbox One/Series X|S console.

Don't expect to see any Call of Duty games or Activision Blizzard titles on Xbox Game Pass until at least 2024. Speaking on the Official Xbox Podcast, Microsoft's CEO of Gaming Phil Spencer said that fans will have to wait a little longer before we see the likes of Diablo 4 or Spyro the Dragon on Xbox Game Pass.