I was searching areound for gliches, and came upon this
"Well it is already posted by someone but i found this out when cod was realsed
Go to a cage match with a friend and get a gun to 149 head shots or kills doesn't matter you still get the 1k xp, or 2k i find it easiest to use kills as ill explain later on.
Ok so once your doing it, as soon as you get the last kill (150) press the ps button and click account management then sign out, you have about 30 seconds to sign back in before your kick from the game, as soon as you sign out sign back in, you will join back in, give it a little time to load up or you will lag and get a error, no head shots from this game will count from here on, though you get - points if you rank up, beware if you go over the - points by say -5000 you will get errors, to simply fix this just play a match normally or turn off your sony, or of course go back to signal player.
After the game, you should have you're 2k points or 1k points, the reason you get - is because when you level up, you go over the bar cause it doesn't register, this glitch for me has worked since the game came out, now why i like to use marksmen challenge is because, i can use it in a real game, and still get the points after it, so i can play get a kill sign out simple, just don't be afraid to go to -1000 it won't do nothing be careful about -5000 once you sign into the game after you sign out you will be kicked with a error.
Have fun with the easiest way to rank up, i went to 10th prestige in a day"
And yes it works
"Well it is already posted by someone but i found this out when cod was realsed
Go to a cage match with a friend and get a gun to 149 head shots or kills doesn't matter you still get the 1k xp, or 2k i find it easiest to use kills as ill explain later on.
Ok so once your doing it, as soon as you get the last kill (150) press the ps button and click account management then sign out, you have about 30 seconds to sign back in before your kick from the game, as soon as you sign out sign back in, you will join back in, give it a little time to load up or you will lag and get a error, no head shots from this game will count from here on, though you get - points if you rank up, beware if you go over the - points by say -5000 you will get errors, to simply fix this just play a match normally or turn off your sony, or of course go back to signal player.
After the game, you should have you're 2k points or 1k points, the reason you get - is because when you level up, you go over the bar cause it doesn't register, this glitch for me has worked since the game came out, now why i like to use marksmen challenge is because, i can use it in a real game, and still get the points after it, so i can play get a kill sign out simple, just don't be afraid to go to -1000 it won't do nothing be careful about -5000 once you sign into the game after you sign out you will be kicked with a error.
Have fun with the easiest way to rank up, i went to 10th prestige in a day"
And yes it works