Tomb Raider - Anniversary - Platform: Xbox 360

Cheat mode:
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Complete the indicated task to unlock the corresponding cheat option. 
Infinite Breath: Complete the game.
Sunglasses: Complete the game.
Textureless Mode: Complete the game.
Infinite 50 Caliber pistol ammo: Complete all four Peru Time Trial levels. 
Show Enemy Health: Complete all four Peru Time Trial levels.
Golden Shotgun: Complete all three Lost Island Time Trial levels. 
Silver Mini SMGs: Complete all three Lost Island Time Trial levels. 
Infinite Mini SMG Ammo: Complete all three Egyptian Time Trial levels.
Infinite Health: Complete all three Egyptian Time Trial levels. 
Infinite Shotgun Ammo: Complete all four Greece Time Trial levels. 

Lost Valley: Attacking raptors safely: 
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When you slide down the slope and the raptors charge at you, ready 
to attack, there is a rock where they cannot get you. As soon as you 
enter the valley, jump on the rock on your left. You will be able to 
shoot them and they will not be able to attack you. 

Midas Palace: Turn golden:
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Have Lara stand onto Midas' hand until she turns to gold. 

Save on medipacs:
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If you are low on health, wait until you get to a checkpoint. Save 
the game at that point. Load the game. This will take you to where 
you were previously and with a full health bar. This is useful, as 
it saves on medipacs which you will need later in the game. 
Alternately, if Lara is low on health and you do get to a 
checkpoint, kill Lara (for example, jump off a high ledge). This 
will also take you back to the previous checkpoint with a full 
health bar. 

Better jumps:
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When jumping up stairs, pull out guns but do not shoot. Hop forward 
and you will glide smoothly up the stairs.