Mission select
At the mission selection screen, hold LT + RT + Back and slowly press Y, RB, Y, RB, X to unlock all missions. If you entered the code correctly, you will hear a sound.
Scott Mitchell invincible
Pause the game, then hold LT + RT + Back and slowly press Y(2), X, RB, X, LB. If you entered the code correctly, you will hear a sound.
Team invincible
Pause the game, then hold LT + RT + Back and slowly press X(2), Y, RB, Y, LB. If you entered the code correctly, you will hear a sound.
100% health
Pause the game, then hold LT + RT + Back and slowly press LB(2), RB, X, RB, Y. If you entered the code correctly, you will hear a sound.
Infinite ammunition
Pause the game, then hold LT + RT + Back and slowly press RB(2), LB, X, LB, Y. If you entered the code correctly, you will hear a sound.
Falcon weapon
Destroy 100 helicopters in Multiplayer mode to unlock the Falcon weapon.
Sniper Rifle
Get over 500 total head shots in Multiplayer mode to unlock the Sniper Rifle.
Warfighter mode
Successfully complete the game on any difficulty setting to unlock the Warfighter difficulty setting.
Slip and slide
While running, quickly click the Left Analog-stick to slide along the ground or click and hold the Left Analog-stick to do a sort of belly flop and slide on your stomach.
Get on roof in Treasury level
In the Treasury level, it is possible to get up on the roof of the treasury. Have your pistol or grenade equipped in order to run faster. Run directly at the back door and dive into it; do this by running and quickly clicking the Right Analog-stick. Make sure your head hits the door and you should teleport to the roof. This also works on the level with the wall. You can teleport up into the rooms on the ends of the wall. Note: This may require some practice and should work with any building with an overhanging ledge that you can dive under.
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