You have really got to take your time and look around corners more then once to make sure there are no enemies. Dont be afraid to shoot through the odd wooden window incase enemies are behind.
You play it.
Nothing. Even on veteran. It's pointless.
What exactly are you talking about? Do you not know what a level is? It's a particular part of the game and when you beat it you move onto the next one.
you have to beat each level on a higher level like a three star and not just a one star mode.
you play the game and once u reach level 80 and beat it you go to barracks and select prestige mode and enter it to prestige
u dont
You can't
You can't. Its impossible
you kill him alot without letting him kill you
Yes, the single player campaign should average about 7-9 hours depending on skill and difficulty level.
At the museum... that place is unlocked when you beat the game.
shoot people while travelling from one end of the narrow map to the other. if you die before getting their put it on an easier setting.