Medal of Honor: Frontline Cheats

Invincibility
Pause the game and press Square, L1, Circle, R1, Triangle, L2, Select, R2.

Infinite Ammo
Pause the game and press Circle, L2, Square, L1, Select, R2, Triangle, Select.

Cheat codes
Enter these codes at the Enigma Machine.

DAWOIKS - Unlock Everything
ORANGUTAN - Unlock Mission 2, A Storm in the Port
BABOON - Unlock Mission 3, Needle in a Haystack
CHIMPNZEE - Unlock Mission 4, Several Bridges Too Far
LEMUR - Unlock Mission 5, Rolling Thunder
GORILLA - Unlock Mission 6, The Horten's Nest
MONKEY - Get a Gold Medal on the current mission
TIMEWARP - Get a Gold Medal on the previous mission
LONGSHOT - Snipe-O-Rama, all weapons are sniper mode
WHATYOUGET - Silver bullet, One hit kills enemies
URTHEMAN - Perfectionist, One hit kills you
GLASSJAW - Achilles' head, Enemies only dies of headshot
BOING - Rubber grenades
BULLETZAP - Bullet shield
WHERERU - Invisible Enemies
HABRDASHR - Men With Hats
FRESHDEMO - Enable "Our Trip to Holland" demo (Requires 30 second wait on main menu)
TPDOMOHTON - MOHton Torpedo
BACKSTAGEO - Making Of D-Day FMV
BACKSTAGER - Making Of Needle In A Hay Stack FMV
BACKSTAGET - Making Of A Storm In The Port FMV
BACKSTAGEF - Making Of Several Bridges Too Far FMV
BACKSTAGEI - Making Of Rolling Thunder FMV
BACKSTAGES - Making Of The Horten's Nest FMV