Medal of Honor Cheats

Go to the Options screen, then enter the password SMPSMDMILK on the password screen (with the typewriter). After the green flash, go back to the password screen, and enter URLINGAMBE as the password. You will be taken to the photo gallery. Go through the gallery until you return to the main menu to have everything unlocked.

After beating the first level of a mission input the Infinite Ammunition code in the options menu. Then play the same level again with the code on. After you beat the level, when you get to the next level you'll have maximum ammunition. Repeat the code on levels that you have beaten, so when you go to the next new level you'll have enough ammo to last.