for black ops you have to get out of your chair then find the computer hold x "for xbox" if u know cheats already then just put them in thes a little keyboard in right top corner.(to get out press LT and RT back and forth)
for modern warfare 1 you have to collect Intel and complete the story mode then you unlock them according to how many pieces of Intel you have collected
and i don't think there are cheats for the others
Press ` and type your cheat
2589
no
i don't know how to pass a level... can you give me cheats?
yes
ping pang pom
No!
gardion
sorry no atleast i dont know any
i dont know cheats but know the rating
After you type in the cheats yes you do press enter.
how do you enter cheats on ds