18, like it says right there on the box
16+
13
17
14 and up
15+ i think
definetely M.
18 years old to purchase, but you can play it at any age.
In the year 2525 if man is still alive if women can survive
M for Mature, 17
18
If you are both comfortable with it.
Call of Duty has been rated a highly violent game. It is suitable for an age group of Teenage years and up. So basically fourteen and up is the age group.