This game is also available on PS2.
Retro Game Cheats for Black (Xbox)
Effect: Unlock silver weapons (unlimited ammo)
Effect: Unlocks the BFG
When:
Enter the code as your name when creating a profile.
How:
5SQQ-STHA-ZFFV-7XEV
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Effect: unlock M249
When:
during create profile
How:
Enter 5SQQ-STHA-ZFFV-7XEV as name. You'll be returned to Entry profile screen, enter name as normal and when you begin a new game, gun will be avaliable
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Effect: Unlock Black Ops mode
Effect: Unlock M16A2