Cheat mode:
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You do not have to press any of the following cheat codes slowly.
Enter them at a regular pace. If it does not activate the first time,
keep pressing it until it does.

Scott Mitchell invincible:
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Press Start during game play, then hold LT + RT + Back and slowly
press Y(2), X, RB, X, LB. A sound will confirm correct code entry.

Team invincible:
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Press Start during game play, then hold LT + RT + Back and slowly
press X(2), Y, RB, Y, LB. A sound will confirm correct code entry.

Unlimited ammunition:
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Press Start during game play, then hold LT + RT + Back and slowly
press RB(2), LB, X, LB, Y. A sound will confirm correct code entry.

100% health:
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Press Start during game play, then hold LT + RT + Back and slowly
press LB(2), RB, X, RB, Y. A sound will confirm correct code entry.

Level select:
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Hold LT + RT + Back and slowly press Y, RB, Y, RB, X at the mission
selection screen. A sound will confirm correct code entry.