is cod4 ok for a mature twelve year old and is it any worse than halo 3?

[besma a]

im 12 years old and want to prove to my mom call of duty is ok

 

[Logan K]

in my opinion, they're both about the same with violence but cod4 curses a little more
but i figure if your already playing halo3 then call of duty wont turn you into a homicidal maniac anymore then you already are