For years, the 2019 reboot was unplayable offline due to Blizzard’s Battle.net requirements. However, recent developments in the cracking community have bypassed these restrictions: DODI Repacks
Perhaps the user is not aware that the legitimate version of the game allows offline play. I need to clarify that. For example, the 2019 modern warfare game does have an offline campaign, so if they already own it, they can play offline. If they don't own it, they need to purchase it legally. For years, the 2019 reboot was unplayable offline