Medal of Honor Cheats
As we all know, war is hell, but, with some help from the following cheats, you might make it out alive, soldier.

Invincibility: Pause the game and press Square, L1, Circle, R1, Triangle, L2, Select, R2.  The game will automatically resume afterwards.

Rubber Grenade mode:  Enter "BOING" into the Enigma machine.  If you enter it correctly, green lights should flash.  Select the "bonus" underneith the Enigma machine to enable/disable the cheat.

Snipe-o-rama: Enter, "LONGSHOT" into the Enigma machine.  If you enter it correctly, green lights should flash.  Select the "bonus" underneith the Enigma machine to enable/disable the cheat.  The cheat allows all weapons to have the zoom capability that the sniper rifle has.