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Xbox 360 - Tom Clancy's Ghost Recon Advanced Warfighter cheats

Cheats:
Press Start while playing the game, then hold LT + RT + Back and enter the 
following cheats

Unlock All Levels:
Y, RB, Y, RB, X (Enter this on the Mission Select Screen)

Unlock 100% health:
LB, LB, RB, X, RB, Y

Unlock Scott Mitchell invincible:
Y, Y, X, RB, X, LB

Team invincible:
X, X, Y, RB, Y, LB

Unlimited ammunition:
RB, RB, LB, X, LB, Y

Unlockables:
Unlock Falcon weapon - Shot down 100 helicopter in Multiplayer mode
Unlock Sniper Rifle - Reach more than 500 head shots in Multiplayer mode
Unlock Warfighter mode - Finish the game on any difficulty level