XCOM – Enemy Within – XBox 360

XCOM - Enemy Within - Platform: XBox 360

Unlock William Carter from The Bureau: Xcom Declassified:
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Select a hero unit at your barracks and then go to the Customize option 
and change his name to William Carter (William in the first name area and 
Carter in the last name area). William Carter is an Assault Class pre-equipped 
with Titan Armor, Alloy Cannon, and Plasma Pistol. You will not be able to earn Trophies.

Unlock Special Units:
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Enter one of the following names during squad customization to unlock the 
corresponding special unit. You will not be able to earn Trophies.

Joe Kelly
Ken Levine
Otto Zander
Sid Meier