go to anywhere mission the press start and triangle r1 r2 x o triangle trialngle circle l3
r3 x o then press start again and look the game!
WOW!! 
nothing happens?? hahaa

Start a new game and get to the bit were u need to use smokes then turn around and start
chucking smokes everywhere u have infinite life because it is a cind of tutorials

u can go to the mision 4 and the biging u can shot the first guy and kill him and when you
kill him shot him again when he is in the ground press up down up down and u can be a girl

this is a cheat press x x o o left right
destroy every body alies and axsis

hows gunna do the misson it got to be fast and i dont fill like it well you can hold start
and press down right up up left circle triange durring play and the cpu well do it for you
very fast so just set back and enjoy

at the main menu go into bonus material and then click weponds then hold select and
press:
right, left, down, down,down,up,up,r1,r2,l1,l2,circle,x,square,right right,up,left and
then you chooese a chapter ect.. then when ur in game pause the game then press:
up,down,circle,circle then a list will come up and you can choose 2 guns u want to use

First i suggest that you use a rifle, like the garand or the lee enfield, kar, etc, if you
try by shootin them close it wont work, so you'll have to go far away, then aim at 'em but
with the iron sights, and shoot, try doing this far away because you can fail the mission
if you're spotted shootin at your friends, i'm always doing this when I need ammo, but
sometimes, you just have to wait for the axis to kill your friends, then you can get ammo,
without killing your friends, I suggest you try first, because sometimes works sometimes
not.