Yes MW3 has a PS3 version of the game
You will get either a message on Xbox Live or a message on the Xbox Live Menu in Mw3. it will pop up and show you how long you are banned. also on PS3.
Sorry Bro There Is No Knife In mw3.
No there is not
Play more and read the wiki on MW3
When you start up the game, there will be menu with three options. Spec ops, Campaign, and Multiplayer. You will want to pick spec ops.
With a Printer.
no u need 6 ps3 games
Yes.
That is impossible
Yes
Its already out i believe