you dont
no
MW3 is after COD black ops.
Cod black ops
There are approximately 52 trophies in cod black ops (Playstation3)
If by which you mean the meteorites in zombies, then holding X, Square or the equivalent on other consoles, on all of them, the secret song for that zombies map is activated.
no
no
No, there is not.
no it is not
Black Ops does have zombies
No, you can only play single player on the CoD Black Ops campaign.
cod: world at war & cod: black ops