I will give a parents guide to this,
This call of duty is worth the buy. I loved the multiple options in the single player campaign. I thought the campaign was the star here. It was great. In terms of age wise, this game knocks on the adult side. Some infrequent but strong language and some brutal violence. Minimum age 13, recommended 14. Not as violent as original blackops. Gunplay is fantastic and the multiplayer actually better than MW(2019). Multiplayer actually has moderate violence and if you are only doing multiplayer recommended age 12. If you want zombies(almost no one plays zombies) it is a bit more brutal and a minimum age of 14. It starts of scary and brutal but then you get magical guns and swords and then there is no blood and it gets very comical. This is worth the buy and a great game!