Return To Castle Wolfenstein - Platform: XBox

Wolfenstein 3D:
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Successfully complete single player campaign mode to unlock the original 
Wolfenstein 3D.

Peeking around corners:
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Click and hold the Left Analog-stick while moving it left or right. The only 
problem is that you cannot shoot.

Head shots:
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Turn off the automatic aim option to get a good head shot. Otherwise, you will 
lock on to the enemy's body.

Airstrike in multi-player mode:
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A lieutenant can call in an airstrike by pressing Zoom, then pulling the trigger 
on where you want the bombs to drop. There is a ten second delay.

Medical kit in multi-player mode:
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A medic can help his teammates by switching to the medical kit. Press R to drop 
it.