Call of Duty 3

Never Die
While in the pause menu, hold down R1 and L2 and press X, X, O, O, Triangle, Square.

All Chapters And Bonus Content
At the chapter select screen hold select and press Right(2), Left(2), Square(2).

2,000 Smoke Gernades
While playing, press R1, Circle, R2, L2, Square. If you enter it correctly, a message should appear.

2,000 Frag Grenades
while playing press R1, R1, L2, Circle, Circle, X. A message should appear.