During gameplay, input the following Cheat Entry Command.

Press RB+LB, then press X, B, Y, A, A. The Enter Cheat menu appears.

Code Effect - Press and hold LB+RB, then press B,B,Y, X, A, Y Full Ammo
Y, X, X, Y, A, B. Full Health

Unlockables

Complete each of the following achievements below to get the allotted gamerscore.

5-in-a-row! (20) Earn a 5-in-a-row.

Cheat Death (20) Complete any operation without dying.
Complete on Casual (25) Complete the game on Casual difficulty.
Complete on Expert (75) Complete the game on Expert difficulty.
Complete on Normal (50) Complete the game on Normal difficulty.
Crack Shot (25) Get 10 headshots in a row.

D-Day in Reverse (25) Complete Operation Neptune.
Death From Above (10) Kill an enemy with a melee kick.
Der Flakturm (40) Complete Der Flakturm.

Flared Landing (5) Touch down with a flared landing.

Go Go Go! (5) Get pushed out of the plane in any mission.
Greased Landing (5) Touch down with a greased landing.

Homerun! (10) Kill an enemy using sprint-melee.

In Yer Face! (20) Kill an enemy by kicking a grenade at him.

Jump Master (25) Discover one skill drop location in each mission.
Jump Training (5) Complete Jump Training.

Master Parachutist (40) Discover all skill drop locations in the game.
MP - American Campaign Medal (0) Be on the winning team for every map in ranked matches.
MP - Bronze Star (0) Get over 20 top three finishes in ranked matches.
MP - Combat Infantryman Badge (10) Kill an enemy player while he is parachuting.
MP - Distinguished Service Cross (75) Get over 1,000 kills and 500 Objective Points in ranked matches.
MP - Distinguished Service Medal (25) Get over 500 kills and 250 Objective Points in ranked matches.
MP - EAM Campaign Medal (25) Play every map at least once in a ranked match.
MP - Good Conduct Medal (0) Play 20 consecutive ranked matches without getting a team kill.
MP - Human Flak Gun (5) Kill an enemy player with a grenade while he is parachuting.
MP - Legion of Merit (20) Get over 10 Objective Points in a ranked match.
MP - Meritorious Unit Citation (20) Get 10 Team Points in a ranked match.
MP - Paratrooper's Badge (10) Kill an enemy with a melee kick.
MP - Pistol Whip (10) Kill an enemy with a pistol melee attack.
MP - Presidential Unit Citation (30) Get 20 Team Points in a ranked match.
MP - Purple Heart (10) Recover full health after being in verge of death state.
MP - Silver Star (0) Get over 20 first place finishes in ranked matches.
MP - Soldier's Medal (20) Get 20 kill assists throughout a career in ranked matches.
MP - Weapon Virtuoso (40) Upgrade all weapons in ranked matches.
MP - World War II Victory Medal (0) Come in first place on every map in any game mode in ranked matches.

Nijmegen Bridge (30) Complete Operation Market Garden.

Paestum Ruins (20) Complete Operation Avalanche.
Pop-n-Drop (5) Crouch-sprint between cover objects.
Purple Heart (10) Recover full health after being in verge of death state.

Shoot to Kill (10) Kill an enemy while moving in iron sights.

Tick-tick-BOOM! (20) Kill three enemies with a cooked grenade.

Village of Adanti (15) Complete Operation Husky.

War Machine (35) Complete Operation Varsity.
Weapon Handler (25) Fully upgrade one weapon.
Weapon Master (75) Fully upgrade all weapons.
Weapon Specialist (50) Fully upgrade five weapons.