I purchased the Call of Duty game of 2022, because it supported XeSS. I want the game to play the campaign, which was truly spectacular on the 2022 version.
In regards to the Gamepass subscription you need to play the game, Activision indicated this:
gamingbolt.com
The game will be also on Steam.


In regards to the Gamepass subscription you need to play the game, Activision indicated this:

Call of Duty: Black Ops 6 Multiplayer and Zombies Won’t be Included with Base Xbox Game Pass Tier
Those subscribed to Game Pass Ultimate or PC Game Pass will get access to the entire game. No modes will be available through Game Pass Core.
Available on:
Xbox Series X|S
Xbox One
PC (Microsoft Store)
Game Pass subscribers on Xbox and PC will be able to access Black Ops 6 at launch (October 25) if they are actively subscribed to select Game Pass plans (Game Pass Ultimate, Game Pass PC, Game Pass Console). Furthermore, this includes the same preorder benefits as well!
The game will be also on Steam.