7 Mar 2006, ID#5399 Unlockables
On Black Ops mode beat the game
Unlock Silver Weapons (unlimited ammo):
On Normal or Hard difficulty level beat the game
Unlock Black Ops Mode:
On Hard difficulty level beat the game
When creating a Profile enter 5SQQ-STHA-ZFFV-7XEV as your name and then press 'Done'. You will then be returned to the 'Profile Name' screen to enter a real 'Profile' name. When the game starts you will have the BFG.